Well I managed to install Mac OS x leopard on my ASUS P4B533, Intel P4 2.0 ghz, 1 gb ram, ati radeon 9550 se, but the problem is that the Ethernet port is on a separate pci card and it doesn't seem like leopard is detecting it cause I have no Ethernet choice when in network preferences. I am trying to do a network bridge from my laptop (w7) to leopard if that poses any problems as well.