HI maya, thanks for your answer but I do not have OSX running yet. Only got windows to work with for now... I de-compressed the dmg and burned it on windows on a dual layer.

I've enterd in the 123boot disk and then the leo dvd it boots fine but then after the white screen with the apple logo it keeps getting stuck on the coloured circle in the corner (right before langauge selection...

any clues are very welcome !

Edit:
i've downloaded a boot 132 with some modefied kext in it. This worked great and I've now got OSX up and running !