I have a Macbook C2D 2GHz with the stock 120Go HD. Currently running Tiger 10.4.11. I would like to install SL. I think I will go for a clean install: boot from the SL DVD, wipe the drive, install SL. Q1) is it indeed better than trying to upgrade? Q2) is my procedure correct? make a bootable clone of my MB HD on a passport USB 160 Go HD with CCC (already regularly done) test again the bootability of this external HD boot from DVD, wipe internal HD, install SL re-install applications copy my data, manually, from external HD to internal HD (manually: documents, pictures, ...) test extensively IF PROBLEMS: boot again from ext HD and restore Tiger. Q3) Any way to import an application that was installed to my new OS? Is it impossible or simply not clean enough? Thanks for any hint!