I was wondering, what would happen if I were to install system 7.x on top of Executor. If you don't know, I may be able to try it at school. We have a site license for System 7, and a bunch of macs that have the DOS compatibility cards, and a T1 link to the net.
The other question is, can it be done in under 10 minutes under Executor?
I think that by putting Apple System 7.5, you will elliminate the problems, because they all (at least the program crashes I have observed) seem to come from the faked system 6 implementation. Your Syn68K seems to run fine, if it can run PhotoShop, and Pagemaker, and Illustrator.
Just out of curiosity, why not make it a Dynamic recompiler, so that it only needs to be translated once. Do the same thing Connectix Speed Doubler does.