Hey I'm after some help with fixing up my old iBook g4 a1045 it stuck on the loading screen iv been told I should reinstall the is,I don't have the install disk, and if not that the HD might be failing,also already tryed fsck but always returns a message volume cannot be restored,did pram and still no luck,so I have got a new HHD external with a dgm file of os leopard,so I tryed booting from external drive And came up with a question mark flashing in a folder,,,,then goes back to original load up screen then turns its self off, so I am wondering if I can use safe or single user mode to access my external drive and reinstall OS,or how would I do this in open firmware,,,,,any help would be much appreciated