Mmm i think you need to inject the AppleNforceSata kext, i think that's his name or im wrong?
Mmm i'm not sure, i wasn't able to make leopard detect my HD in my laptop acer too ;(
but i think that with that kext it will recognize your HD, just you should edit your HD ID in the kext
and its done, well thats what i know, lets see what say the masters
cya!