I have just purchased an older iMac (hurrah for eBay!) to replace a machine that died, and I seem to have made a complete hash of it and now I'm a little in the lurch!!! It's an 8,1 machine (2008 Core 2 Duo) and I bought it to work alongside another 8,1 I already have (not the dead one - that's gone), only this 'new' one has more RAM and a larger drive. I bought it on the understanding that it was running 10.5 Leopard (same as my current iMac). At the same time, I bought a new external drive which I set up as a Time Machine drive after copying all my work files from my other machine onto the Mac - ~500GB including other files etc I also put on. So - I have a Time Machine backup of the whole 1TB drive and as a result of that, have reconfigured my other iMac to make better use of its resources as it has a much smaller drive (320GB as opposed to the new one's 1TB). At this point let me say that the reason I use an older iMac is because 'it just works' - I don't need bells and whistles upgrades - yes, I do some heavy Photoshop work quite regularly, but I've never had to wait excessively for it to do its stuff... Anyway: My problems start here. It's not running 10.5, it's running 10.6. I discovered that when recently running Disk Utility, where it failed to complete the disk verification. So my intentions - re-boot from the supplied 10.5 DVD (with all fingers crossed), wipe the drive and completely restore from Time Machine. Upon preparing for this, I had a music CD in the drive which, upon ejecting, 'pinged' the DVD drive and, although the CD came out, after a little coaxing, I don't trust it and therefor the iMac no longer has a usable DVD drive. On top of this, I have a LaCie external USB DVD drive that the machine will not recognise!! So, to re-cap - I need to attend to an 'affected' (I don't want to say 'damaged' at this point in time) hard drive. I have a machine that is running a version of OS X newer than the version I have on the supplied disks. I don't have a DVD drive that I can use to boot from. I'm stuck. Help!