I may have changed a setting and didn't realize it. How do you hide the bios in MALA's MAME list?
Do you mean the dos screen when a Game starts?
I guess he meant the bios files which are required for some games, for example neogeo.zip.
Did you take a look at the mala.ini ?
The bios files like neogeo.zip are not listed in the MAME game lists if the list is created with a MAME XML file.