Chad,(posted 9309 days ago)You are correct about zipfile support - in the days of Mame030b we had to rely on the front-end to do the unzipping.
While Mame030b would work with ZipFolders or ZipMagic, the native zipfile support was not added into Mame itself until Mame031b. In the latest Mame035 release candidates the unzipping is now handled by the ZLIB zip utility. (ZLIB Homepage)
So for anyone else wanting to playback Mame030b files you will need to unzip the rom zipfile into the appropriate directory in /mame/roms.
Cheers, BeeJay.