Hi All I just bought myself a G4 off ebay.. I have a few questions.. I have OS X version 10.3.9 on there and im wondering if i can just download an update to 10.4.2 or do i need to purchase that ? I looked all across apples website but i couldnt seem to find an update from 10.3.9 to 10.4.2... Also i have Sony DRU500a and Pioneer DVR109 DVD burners here, ideally i would like to put the SOny in the mac if i can but im wondering if its compatible ? If its not is the DVR109 the same as the superdrive ? From what i have seen this seems to be the case, but im not 100% sure ?? It would be handy to know before i go pulling things apart.. Is there anything like a bios on a mac ? Im just wondering what the default boot sequence is and if it can be changed ? Any help is appreciated..Cheers..