martin, the forge tools reference files ARE the cause of the crashes as they were for sins 1.15 and entrenchment 1.00 ONLY.
I assume your win7 box had the current sins 1.191/entrenchment 1.051/diplomacy 1.011, and you old vista box has the sins 1.15/entrenchment 1.00 only
both myfist0 and myself have uploaded complete texted sets of files for modding all sins & expansions in the CURRENT versions.
and it does help us to help you if you tell us which sins/entrenchment/diplomacy version(s) you have on the computer(s), as there have been MANY changes in the entity files AND even MOD structure during the life of the game and expansions.
harpo