What I have not done was what I have been trying to do on a Macbook with a knackered cd drive to replace or maybe dual boot with snow leopard to use Linux online and snow leopard for my apps one of which I cannot do without given the learning curve for Gimp is far too steep for me and yes, I have given it a good go. But if not dual boot just install Linux complete and run SL and my apps via an external drive of which is what I am sort of doing now given reinstalling on another drive from a Time Machine backup killed my Photoshop installation - a problem with Adobe I understand, but I have the original installation on an external drive to be using it that way. And am not worried about losing SL if something should go wrong as I have the Time Machine, a bootable SL install USB and I even have two cloned drives.