Right, firstly I should say hello!! And I hope I can now get some help finally

I bought a Powerbook g4 550 off of ebay for 20 pounds

it hadn't been used for two years by the owner! I bought a charger for it and behold! it worked, it made the chime and everything seems to be working... except for the left hinge!
The only problem is that it has no operating system and I've been trying none stop for five weeks to get the machine to work with linux distros, but none of them work :'( either the discs have errors or they don't install properly... I've used GUI (live) installers, which looked like they worked, and then i rebooted the machine and it didn't work! I did try the 'video-ofonly' thing too but that don't work either.
I then finally found this os on wikipedia and decided that it looked easy enough!! but I still feel as if I could easily go wrong... Can anyone give me advice for installing the os?? so that i wont go wrong??
I'm really good with linux and windows, just not linux and mac! any advice will be greatfully recieved
