Thanks Ash, I think I figured it out. The ide cable may have a fault in it. If I power down and press it, its fine next power up. So I will order a new one.
I'm currently using your image, very nice (had to change to English hehe).
As a side note, is there any benefit to using tiger instead? In terms of performance an memory utilization? My plan is to use my atv as a portable media server I can bring with my to friends places and play movies. I want to use plex as i use that one my current projector setup. I want smooth playback (I need to fully test your 10.5.8 install for that still). I also need to dig around and see what more I can slim up to free up as much mem as possible.
I've seen more information on 10.5 than 10.4 I find that odd hehe.
Your suggestions are very appreciated!