umm.. eh..?
@VipNatePimp
I know the mission you're talking about. But haven't played it in more than a year or so..
You should read the readme file which comes with the .zip. It's almost the most excellent readme.txt I've seen to be distributed with a script.
The 120 refers to the size of the shell. For example Bmp fires 73mm shells and a T80 tank fires 125mm shells.
So if the script has for example shell120 in it you can replace it with shell73.. or grenade.. or laserguidedbomb if you want to.
There's a list of string names of weapons and ammo in the editors depot. Search for it. Here are a few of them:
Shell73
Heat73
Gun73
Shell105
Heat105
Gun105
Shell120
Heat120
Gun120
Shell125
Heat125
Gun125
To use a small explosion try either 'mortar' or 'grenade'.
@Drozlov
As I understand it the size is the diameter of the shell in millimeters.
A Heat120 would be a high explosion shell of 120mm diameter, and Shell120 would be a 'Sabot', high impact shell, in lack of better words.