Seems easy enough BUT there is no cd/dvd drive on the MacBook Air, hence my situation here. Woops! Didn't read that part @ 5am this morning lol If you have the snow leopard disc, what you can do is use an 8GB or larger USB drive and create a bootable USB using the cd. I can write up some doco on how to do that tonight (I'm at work) Another option is using another macs DVD drive (eg yours if you have one) and starting the MacBook Air in target disk mode and it can reads the disk from the other mac (can't remember if you can do this over network though, or if you need a FireWire cable, which you probably don't have) USB option is probably easiest to walk you through, find an 8GB or larger USB that you can format and ill write up some instructions tonight for you PS you do have access to another mac, right?