ummmmmmm No and no and no =)
There will be no Direct3D support for voodoo2 until you get offical 3dfx drivers after win2k is out. No Dx7 won't give you d3d support(btw dx7 with the *older* files is now included in 2176, may have been in 2167 or 2151 as well, I'm not sure) and no you can't use voodoo3 Direct3D drivers. Hence they are called Voodoo3 drivers not Voodoo2 drivers. Those 2 cards are VERY different.