i've noticed alot of posts here about 'file not found' or 'how to set up the %fasminc%'

my suggestion:
make an installer for windows and have it write the installation path/INCLUDE to the fasmw.ini and have '%fasminc%' in the examples

could be of some use. putting together such installer shouldn't be big problem, and if it will remain "clear" (no more mess than these two things, no uninstall, no registry etc.) then it can be nice