Yeah, I prefer zip as well... it's fast and reliable.

@Dullaron: to clarify, QMC2 doesn't require support for 7z to play the games as it's all up to the emulator (to support 7z ROMs)... the only area where it counts is the "ROMAlyzer" within QMC2 which doesn't support 7z (yet) and would tell you that the ROMs weren't found instead. However, the ROMAlyzer doesn't even support software-list ROMs (yet), only game/machine/device ROMs, so it actually doesn't matter at all.

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]