CTD in 5.01 with new map pack

Hey first off, this mod is spectacular!! Thanks for taking the time and effort!

My friends and I are having trouble with CTD on several maps since installing the new map pack for 5.01. It's pretty consistent that the crash occurs just as the map finishes loading but before entering the game to select kit and spawn point etc. Strangely, several of us will get into the map and one or two others will crash. We don't all crash on each map. All of us have BF2 1.41 and 5.01 client patch as well as the new map pack. We also have our graphics on medium settings. I don't know if this makes a difference but we play multiplayer games on a "local server" via Hamachi. We were playing this way without trouble before the new map pack install. Oh and the CTD isn't just on the new maps. We are having crash to desktop problems on the original maps which we played without any problem before. Any advice is appreciated. Let me know if you need more info from me. I'll try playing in window mode next time to see if I can get an error message. I'll update if so. Thanks