I got my 27 iMac back from Apple Care today. They replaced the HDD and were suppose to replace the optical drive as well. It came with a fresh install of 10.6.8 and I wanted to upgrade to Lion. So I plugged in my external and opened up Lion (my buddy gave me a copy, so if you think I am a thief, simply don't reply) and ran the instillation all the way through. Once it was finished, I noticed the disk was named untitled and I didn't like that (call me OCD) so I tried to partition it, but it kept saying the disk couldn't be unmounted mounted. I decided I would just erase it and then boot from my snow leopard install disc (yes I actually purchased this, woohoo) and repeat the process again with my newly titled HDD. Well low and behold, it spits out both the iMac OS X (10.6.2) install disc and the Snow Leopard (10.6) retail disc. I tested the optical drive with a Movie DVD when I got home and it worked just fine. So my problem is I am stuck with recovery drive alone and nothing else. Please don't tell me to buy it, because I am asking how to revert back to Snow Leopard and not Lion. I am stuck and clueless, any community help would be appreciated!