I got OSX 10.5.4 to work. (finally ! )
However I returned to windows from the bootloader (darwin)
And realized afterwords I cant get back to OSX. It says something about Panic Boot in black text, then turns off my computer.

So, when I got into windows it said something about needing to restart (new hardware)
I think this caused the issue, I cant be the only one with it. Anyone know what to do ?