General tip for ctd's, if when the game crashes, it shows up the debug dialog, instead of closing it, check the details, and take note in which module the problem is, for example:
if the fault is in SH3collisions.act, it's a good bet that there's a problem with a .zon file, if it's SH3Sim.act problems on a .sim file or .dat file, and so on.
The more info you gave us, the greater the chances to find a solution, it's really hard to find a problem without narrowing the options.
Ref
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