[Imp]

I am not sure here at all but if you slow the APCs to a crawl i think the infantry might get out if walkings as fast.

Dont think the game was really designed for this I still get very hit & miss & having a couple of logic toggles you could place would have helped no end.
Plot path with waypoints putting logic markers where you like.
A) Load unload passengers
B) Drive at speed rather than trying to control with waypoints.
C) If enemy visible stop use path 2 etc.
Couple of global ones to handy for raids & ambushes like once enemy is seen start routines from that turn saving you trying to guess where the player will be.
This really is where the program shows its age/limitations considering lack of options AI does surprisingly well sometimes.