That sure sounds like a hardware problem. I can't run this mod very well at all on my old computer even on the smaller map sizes (32 bit ,4 gig ram older graphics card) but it runs like a charm on my year old rig (64 bit, 12 gig ram, better graphics card). It might help to turn the animations off and the graphics all the way down and play with only one or two opponents on the very smallest map size, but you may still get the crashes after awhile if this is happening after only a few turns now. Also, storms used to cause severe problems in the ROM-AND mod; you might want to turn them off.