Really strange problem..... Networking

I dont know if im allowed to ask about hardware problems, but none of my searching gave me any result…
Seems like im the only one who has that issue

I have 3 different Ethernet card, every one works great under Windows.
When i perform a clean install of Leo 10.5.2 (rev1 or 2), networking works great out of the box, as long as i dont install videodrivers, than i dont install video drivers… than i get a Pure white screen right after a grey screen with an apple and Loading circle… And it hangs Dead…
When i take out the Ethernet card - evrything works great, including video...

So i have video or networking working.
How can i handle that problem?

My specs are:
Amd athlon x2 4000+
Msi K9N Neo(nForce 550, Vitesse networking, doesnt work at all, Realtek HDAudio, works with HDAPatcher)
2xSata drives, 1xIDE Drive(OSX is here)

Ethernet cards:
RTL1839D(works out of the box, doesnt work with video drivers installed(tried 3 different sets of video drivers, including ones from zephiroth's wiki))(works great on my friends PC, who also has OSX installed)
D-Link DFE-520TX(doesnt work, tried ton of drivers, none helped, but i dont get a white screen, system boots OK)
D-Link DGE-528T(getting white screen again)(works great on my friends PC)
Greatest solution would be to get onboard one to get working, but looks like its not really possible now...

PS:I love OSX(since first time saw it) and really apreciate Zephiroths great work!