New user having issue with updating a specific rom to a hack version or adding multiple version roms to the wheel

[ctozzi]

Hi all, new to the forums, 1st post...I have a problem that is probably simple to fix but I just cannot figure it out:

1. I made the mistake of trying to add the juggernaut UMK3 rom in my rom's folder to replace the current one. Now I get " zip file error " all i did was copy and paste the new umk3 in Arcade-Mame-Media-Themes UMK3 & System Roms-Mame-Roms.

2. Hopefully #1 is now fixed...My 2nd question is how to add multiple version of the same game to the mame wheel. I'm looking to be able to play various version of all the mortal kombat games and have them all listed in the mame wheel to jump between.

Thanks for any guidance

Chris