Here's my solution to the Rosetta problem. I'm sure there are people who already know this, but I only just tried this out, and I'm sure there's some newbies out there who'll be happy that there's a solution. We all know there's the partitioning your mac to run both Lion and Snow Leopard. My solution is similar. Get an external drive (or you can buy an internal drive, and then get a cheap enclosure case from Amazon to make it an external), format the drive, and then install Snow Leopard on the external, and then boot it from the external drive. This way, you have your primary which is Lion (or Mountain Lion when it comes out), and you have Snow Leopard on a separate hard drive, and you don't lose precious hard drive space on your primary drive. Then you will have the best of both worlds