I doubt, what they said did help you...
cause i use to have the same problem.
Trying to open the exec(editor); and it would give you a
Kinell error or something similar to that wich would make crash your tribe everytime. :-/
I had reinstall tribes, but this time i only used some scripts that had something to do with tribesRPG
and now, i have no problems with editating, only need of experience
some scripts where not compatible with tribesRPG (my deduction).
Good Luck
-Jon-