I recently installed a Cendyne DVR 105 in my DP 450 G4, 1.5 Gig Ram and it works fine with toast. I tried to upgrade to OSX and it gets halfway through the installation and unexpectedly quits. I tried 3 times to install it. I am trying to put it on a second HD, I am keeping OS9.2 as my startup OS and it is on my primary drive. The only reason I am putting OSX on my computer is so I can use idvd. Has anyone had any trouble installing OSX after putting in an after market DVD burner? Could this be my problem? I also have a Matrox RTmac card installed, I know that there are no drivers for OSX yet, but could it being in there prevent me from installing OSX? Thanks.