Right guys, heres how you do it.
 
I've cut and pasted this post from Chavez's post on the VET site, hope he doesn't mind, but this info is too good not to pass round.
part
 
Here are the directions to set up mp bindkeys for VC2...thank you John Hannible Smith!
 
add speech = to you user_mpmenu.ini
 
example :
 
[entry 8]
txt = waiting
tochat =
speech = 30
hotkey = 8
 
you can use sounds from nr 001 to 166
 
---------------------------------------------------------
 
John Hannible Smith wrote: (for every number there are like 3 sounds) 166X3= a lot !
 
for example:
nr35 can mean a couple of things:
Get some!
You're dead meat!
Take this!
Better dead then red.
 
 
so here are some of the basic sounds
 
[MenuMain]
Title = 3193
 
 
[Enemy behind]
txt = 1828
tochat = 1829
speech = 134
hotkey = 1
 
 
[Machinegun ahead]
txt = 1830
tochat = 1831
speech = 135
hotkey = 2
 
 
[Sniper ahead]
txt = 1832
tochat = 1833
speech = 136
hotkey = 3
 
 
[Target ahead]
txt = 1834
tochat = 1835
speech = 137
hotkey = 4
 
 
[Single enemy]
txt = 1836
tochat = 1837
speech = 138
hotkey = 5
 
 
[Multiple enemies]
txt = 1838
tochat = 1839
speech = 139
hotkey = 6
 
You can say almost everything: from "roger that skyhawk" , to "give me a cigarette"  
 
PART 2
 
Here are all the respective sounds you can use with your bind key settings...thank you Cannon!
 
Here's a rough breakdown, not the exact words spoken as the first 112 have multiple options. I've not tried these all in the user menus, so let me know how you get on.
 
 
 
types (with multiple variations)
 
1 light hit
2 heavy hit
3 heavy hit by grenade
4 almost dead
5 dying
6 final death
7 falling down
8 moving on position
9 telling rest to move
10 eliminated apc
11 eliminated car
12 eliminated truck
13 Eliminated vehicle (tank)
14 Eliminated vehicle (boat)
15 Eliminated vehicle (helicopter)
16 Throwing grenade
17 Firing RPG
18 Sees enemy vehicle (APC)
19 Sees enemy vehicle (car)
20 Sees enemy vehicle (truck)
21 Sees enemy vehicle (tank)
22 Sees enemy vehicle (helicopter)
23 Sees enemy vehicle (boat)
24 Found a trap
25 Found a mine
26 "Checking dangerous spot (window, etc)"
27 Commenting player's kill of helicopter
28 Commenting player's kill of vehicle
29 Commenting player's kill of tank/apc
30 Waiting on one place for too long (in peace mode)
31 Eliminated enemy with grenade/RPG
32 Eliminated more enemies with grenade/RPG
33 Eliminated second enemy fast after another (doublekill)
34 All enemies around down
35 Shooting at the enemy
36 Swearing at the enemy
37 Is under fire
38 Is reloading
39 Sees enemy grenade
40 Sees enemy RPG
41 Request for medic
42 Request for medic for other soldier
43 Going to give ammo
44 going to give health
45 Giving ammo
46 Giving health (medikit)
47 Sees many enemies (AI thinks it’s overwhelmed)
48 Checking corpse
49 Checking corpse and shoots it for sure
50 Commenting player's kill
51 Commenting player's kill by grenade
52 Player throw grenade too close
53 "(peace)Player is standing for too long on one place, not moving with team"
54 "(fight)Player is standing for too long on one place, not moving with team"
55 Get’s hit by player
56 Player is shooting dangerously close (in peace mode)
57 Player is shooting somewhere where there are no enemies (peace)
58 Under attack from unseen enemy (sniper)
59 Eliminated enemy (various type according to weapon) generic
60 Eliminated enemy (various type according to weapon) mgunner
61 Eliminated enemy (various type according to weapon) rpgman
62 Eliminated enemy (various type according to weapon) sniper
63 Sees first enemy (various type according to weapon) generic
64 Sees first enemy (various type according to weapon) mgun
65 Sees first enemy (various type according to weapon) rpgman
66 Sees first enemy (various type according to weapon) sniper
67 Sees another enemy (various type according to weapon) generic
68 Sees another enemy (various type according to weapon) mgun
69 Sees another enemy (various type according to weapon) rpg
70 Sees another enemy (various type according to weapon) sniper
71 "On position, everything is clear"
72 "Warning, windows"
73 Warning doors
74 Warning boobytraps
75 cover me
76 cover me in fight
77 Check the area
78 Check the bodies
79 Hold position
80 youre blocking doors
 
responses
 
100 ally killed
101 "generic apraisal for kill, good job"
102 reaction on tank/apc report
103 reaction on overenthusiastic line
104 response on pain cry of ally hit by player
105 request for the cig resp
106 response on where is the enemy
107 give me more enemies!
108 "I am unstoppable, invincible, they cannot kill me"
109 why are we waiting? Lets' go? Should we move?
110 "generic response to ""sector cleared"""
111 "Ally is calling to enemies ""Surrender"""
112 too much of them!
 
mp speeches (singles no variations)
 
120 I need a Medic
121 I need ammo
122 I need backup
123 I need covering fire
124 I need an Engineer
125 I need an airstike
126 OK
127 Negative
128 Area clear
129 I am in position
130 Taking fire
131 Stick together
132 Enemy!
133 Hello
134 Enemy behind
135 Machinegun ahead
136 Sniper ahead
137 Target ahead
138 Single enemy
139 Multiple enemies
140 Move forward
141 Escape now
142 Defend
143 Freeze
144 Follow me
145 Move up
146 Hold position
147 Disperse
148 Flank Left
149 Flank Right
150 Positive
151 Confirmed
152 Affirmative
 
153 Grenade
154 Ready and waiting
155 Regroup
156 Watch my back
157 Thanks
158 Sorry
159 Friendly fire
160 Cease fire
161 Request fire support
162 "Targets marked, start approach"
163 "Roger Hotel, D

Well done thnx Gibbs this is the kind of actions that can get you promoted in CONG...Cheers

For all my Vent buddies who were struggling with this.
 
Try this...it's a screenshot from my setup
 
Just cut & paste this into your user_mpmenu.ini file in your Vietcong root folder (edit it with Notepad).
 
[entry 8]  
txt = waiting  
tochat =  
speech = 30  
hotkey = 8  
 
Then change the speech number to whatever you want from the list Gibbs posted.  Access it by pressing the Home button when in the game.
Make the txt and to chat the same as what your man is saying.  You could also change the hotkey number to one on your keyboard as a short-cut.
 
Hope it helps
 

where is the root thing i am lost as well lol

Ok, my old sausages, lets do this one step at a time, I'm presuming that you are using XP, have a hard drive that is called C and that you have a normal VC2 installation.
 
Now you can short-cut if you know where your VC2 folder is, but follow the steps if you are unsure.
 
1, Double click on 'My Computer'
 
2, Double click on the C drive, this is your hard drive, not the DVD or CD drives.
 
3, Find 'Program Files' in the window.
 
4, Double click 'Program Files'
 
5, Find the folder called 'VietCong 2' or 'VC2'
 
6, Double click that folder.
 
7, Find an icon called 'user_mpmenu.ini'
 
8, Copy the following (BUT NOT THE BRACKETED PARTS!)
 
[entry 8]  
txt = You can write in this or leave it blank
tochat =  What you write here appears on the screen in chat for others to see.
speech = 30 (This number tells the computer to use a certain speech sentence)    
hotkey = 8  (You can decide which number will make your character speak the selected words)
 
8, Double click on the icon, it should open up in notebook.
 
9, Right click in the opened user_mpmen.ini and select paste.
 
10, Change the bits and pieces in the tochat line, speech number and hotkey to whichever you want, or just wait and see how it turns out.
 
11, Go to the top right hand corner of notebook, left click and find 'save', save your changes.
 
12, Close notebook, close all opened files, (i.e top right, red X them)
 
13, Start up VC2
 
14, Start multiplayer, select host LAN game,start a DM match.
 
15, Once in the game (ie, you can run around) find and press the 'Home' key.
 
16, Press your '8' key (if you left 8 as your hotkey)
 
17, Your character should say 'Waiting' or something similar.
 
18, you can add loads of these hotkey and speech numbers using the same technique.
 
 Ok, theres a very easy guide to it, if you need further let me know, We can do it over the vent channel in real time.