I think im gonna do it, and in the process im going to end my woeful time of running solidworks 2008 via parallels and instead use bootcamp to run XP properly. the only way i can legitimately do that is to have leopard since you cant have the bootcamp beta no more anyway..... i dont really wanna start afresh, i have things how i wish and dont want nor do i have the time to restore things. im not sure my HD is gonna be big enough for a archive and install, so is it ok to do this instead? 1) make a read only backup (bootable) of my current tiger install 2) do a erase + install from the leopard disc 3) use migration assistant to bring back all my apps and settings? 4) in the event of a tits up occurance... i can restore tiger from the backup. will that work? at present i have about 55gb left of my 160gb internal drive, if i delete my windows xp VM from parallels that should bring in another 15gb. would 70Gb be enough for an archive+install? im guessing no.