Seed/Key algo

I do have a dump from the flash card of from a TechII.

I tried to disassemble it, but it's not comming out right.
I know where the PCM (powertrain control module) program is on there and stayed away
from that (68K processor)

It appears to be intel code, but I think the main program is
in the TechII and the flash card is full of indexed sub routines.
Some of them look ok, others end with errors.

That is going to be impossible to find.

I have another program by an aftermarket company, but it's packed/compiled. I tried using compiler detection 2000, but it can't figure out what compiled it. They also ecnrypt their PCM
images.

I know the seed/key is based on the vehicles VIN number.
I was hoping there would be a program that might be able to narrow down some combos if I gave it enough info.

The problem with this is where do you start

Thanks.