MinWah,
The case that i was going to use it was for Zinc and note in the roms that have sound or not. Then maybe someday put some junk in for the Nes and SNES... I don't know of any Cat files for the other emus (besides the one i ran into for Zinc).
Regarding a NMS file, i could use that for the z26 emu cause it doesn't accept spaces. Know anywhere i can get one?
I would suggest using the driver section, as in MAME like this:
driver ( status good color good sound good palettesize 16 )
It is important that you keep it the same...for your purposes just change the 'sound good' part to 'sound preliminary' for games that apply. You'll probably end up with 'General Status' and 'Color Status' filters too (which are a bit useless in this case).
Depending what you want to add for NES/SNES, you *may* be able to add it somewhere. The manufacturer part would accept a string (again, copy the format from MAME -listinfo).
Yes, 2600 emus are ideal for using an NMS file with...see the attached (rename to .nms)