Not really familiar with zarchiver, but might be able to help with the roms bit. After downloading the games you'll need to use an archive extractor to extract the games, so you get a .iso, .bin/cue or .img/.ccd files, then load those with your emulator. It would probably be easier to extract the game files on your computer with something like 7-zip, though that would require connecting your device to your computer and copying the files back and forth. If they're on an sd card and you're using an android device it's pretty easy; just connect a USB cable, and it should give you the option to connect automatically.
"I think that the problem with this video is it is highly derivative of many popular bands within the genre. Although when viewed on its own merits, it does have a deeper groove. However what it has in groove, it lacks in originality. One can't help but be reminded of such bands as Pearl Jam, White Zombie, Suicidal Tendencies and other bands that bear the mantle of so called "Alternative Rock". One is even reminded of Lorie Anderson when she wore curlers. Hehehmhm! This video speaks less to the heart and more to the sphincter. In closing, I think Korn would do well to learn more from -"