wheres the key settings file?

[Makanyane]

Main one you need is in Rome - Total War/preferences and / or
Rome - Total War/BI/preferences the file called preferences.txt
has most of the options inc. graphics display sizes, unit sizes etc.

There also seems to be an unlocked.txt generated in the relevant campaign folder that I think might stop you having to fight tutorial campaign again - not entirely sure about that but you may as well copy it.

EDIT: sorry just realised you probably meant keyboard shortcuts - and that answer probably didn't help - got confused over key i.e. important versus key i.e. keyboard...