To run launcher, get in car, and push Horn button.
If you want fire, use Fire button.
To hide launcher, push Horn button again.
Some bugs fixed
Model of bazooka (rename old file to OLD or something and add new to gta3.img)
So, could you just remove this mod, finish PCJ600 missions and then attach this mod with the game again?
Yep, it can be solved this way. But didn't You hear that using global variables in cleo messes up the gameplay, i mean problems or no possibility to start some missions, crashes, not ringing telephone booth, not working mission markers and so on. I and many other people experienced this many times, moreover the problem was explained not once somewhere in the forums, so i can confirm that globals are bad. Maybe try to convert Your code to local ones and then we will see if this guy will still have troubles woth passing gameplay. The mod itself is awesome ... maybe You can try to do a code for underbarrell granade launcher for M4/M16?