@white
For me better than youtube videos are repair guides from
iFixitcom.
Select your powerbook type and go on!
But the easiest installation is via USB like bigfoot and jPV said. Last week I installed my new overclocked Mini via USB - I have the same problem vith DVD like you - it is totally useless
AmigaOS3: Amiga 1200
AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, AmigaOneX1000
MorphOS: Efika 5200b, Pegasos I, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad