iMac PowerPC G5, pre-iSight I've checked out tutorial vids on youtube, and all three seem like dummy proof installations. My only problem is, I've never installed any kind of software in all my years on computers. I don't want to do something I'd end up regretting. Will I be fine upgrading the internal HD, Superdrive, and Ram? Or should I just pay the premium and have someone else do it?