> if I place a mamece game rom in the same folder as I have placed previous game
> roms that worked(meaning that they showed up in the mame ce3 list on my
> em500)does that mean that the roms don't work or is there a specific game rom
> type that i should be looking for or what?please help.
>
If the game is enabled and it is a good ROM file it should show up in the list.
Select "Show All Games" to see if the game is enabled.
Open the zip file with Winzip and/or try it in desktop MAME to see if it is a good rom.

Cheers,
-Techmaster