take a look here guys and gals
http://x-null.net/MOH/
this guy , for many years , was responsible for a number of hacks/cheats/workarounds and so forth for allied assault i believe he was also the creator of the shoot thru walls hack (STHW).
According to him he basically knows virtually every exploitation in the game so now instead of exploiting the game he now intends to patch up all these exploitations with an unofficial patch release for MOHAA . (1.12)
Theres not a great deal on at there at the moment but im sure in weeks to come updates will follow.