CTDs as you say a nightmare :$
Here some standard reactions:
- did you install a new scenery the last time? Deactivate it or them and see what will happen
- enable "Empty cache" in the scenery library
- empty your temp directory / Internet cache
- Use the tool
Filemon - it monitors your system in real time and can identify the reason of a crash - you can define a filter expression with CTRL-L (= "fs9.exe") and start the tool. Just start FS until the CTD occurs and filemon will tell you which file was loaded at that moment.
Sometimes files are broken (incorrect check sum) by installation and cause CTDs - if yes, you can copy them seperately from the installation CDs without the need of reinstalling the whole FS.
Good luck