Ok I've downloaded & installed BF 2142 official v1.51 final and First Strike v1.4 & FS_SP work with it. To tell the truth, any of the FS updates I got from you guys - either of Gwynzer's and Dnamro's - didn't really solve the CTD issue I'm experiencing on FS_SP Bandomeer Refinery & other atmospheric dogfight map(s), but - with BF 2142 v1.51 final - at least it seems we'll know a lil' bit more about the problem and I guess this may help to improve any of the FS_SP/conquest coop maps which include flying crafts based on FS v1.5.
Firstly the FS version I use : FS v1.4.1000 updated with Dnamro's FS v1.4.1013 pack.
My experience that could help is : when BF 2142 reaches to a CTD, BF 2142 v1.51 final doesn't just quit without any single message like BF 2142 v1.50 does, but it displays a standard system application error message and puts report into the OS event log. I've checked this log and found that the error occurs in the file ...\Battlefield 2142\AIDLL.dll , what - if that's anything to go by - seems to me an error that comes from one or more events in the game what AI engine/code is not prepared for.
Another improvement I experience with BF 2142 v1.51 is that a glitchy and badly bothering explosion effect I had on Bandomeer Refinery with v1.50 is fixed now.
Additionaly - this is BF 2142 version independent - it seems to me that if I set up rebel vs imperial player number ratio to 1:3 on Bandomeer Refinery (keeping the number of all players!), breakdowns happen more rarely.
Lastly, I see an issue on all atmospheric dogfight maps what I guess is solved on conquest mode versions of these maps that if a player (meant human player, not sure if it's not true for bots as well) tries to get in a starfighter craft of the opposing team, that makes BF 2142 CTD. Additionally I experienced this on another atmospheric df map when as a rebel player I tried to get inside a stationary shield dome of the imperial team.
It's not the place or the time what's really important in the Universe but the speed ...