thanks to everone who's contributed to this project

I downloaded the mame02.exe and installed it into a mamebin directory alongside a couble unzipped rom folders.
and i get the following errors
in the dos window --- unable to initialize machine emulation
in the 720mame window--- MAME CORE ERROR--problem initializing mame core..hardware incompatability or perhaps a misssing rom file.
my directory tree is as follows
\mamebin\mame02.exe
\mamebin\bombjack
\mamebin\bombjack\..unzipped roms
please point me in the right direction or just give me the answere outright....