Don't bother with samples. They aren't even supported.
Try selecting "show clones" and see if they show up.
If not, select "show all games" then scroll down to the
game you wish to play. Try all of the games listed with names similar to what you want (there are likely a number of variations).
If that doesn't work, you either have bad roms or don't have them in the right place.

Darren
> I installed MAMECE 8.1 (extra large build) on my Casio E-125 and downloaded pac
> man and galaxian. When I run the MAMECE program, it doesn't show any games
> available. I set up the directory structure as suggested, with MAMECE,
> MAMECE\ROMS and MAMECE\SAMPLES. I have not unzipped the roms. Do I need to
> also download a SAMPLE file too? Please help. How do I get MAMECE to show
> which roms I have on my device?
>