Sry....i canīt give you any advice using a 754 MB with PCI-E. I tried to install MacOS with the same MB as yours with no success.
But if you have any AGP Card there, try the Asus K8V-SE. I installed everything with this MB and it runs well (sound not tested yet).
Here are my specs:
Asus K8V-SE
Sempron 3100 + (Paris Core)
1024 G.E.I.L DDR Ram
ATI Radeon 800 Pro AGP
Realtek 8139 Network Card (onboard doesnīt run for me)
Perhaps iīm looking for some Intel components on eBay, but for now, everything works fine (i also managed it to install World of Warcraft and it runs

)