Integrated graphics with shared memory are considered to be NOT supported at all. Some Geforce 9300/9400 are supported with Natit and latest OS X versions (10.5.6/10.5.7) but others I'm afraid it wont work so you would need to add a PCIe graphics card.
The interfacenamer comes from the lack of a working ethernet card, is it yours disabled in BIOS or something? I got a 630i and its ethernet is detected out of the box in 10.5.6 (but I got no network there so I cant say if it works).