Dual Boot Vista and XP with Vista already installed

hi,
i followed all the instructions properly, and now i am booting left and right between operating systems. comp starts up like it should, choicing me with both OP systems, and everything else is super.
But i do have a little prob, and i hope someone can help me. /i am using a comp with vista pre=inst, on a sata HD. getting XP as a second OP to run was no problem at all, the problem now is, that i can't seem to make my hardware work properly with XP.The proper display driver(nividia), adapter, network, and so on are giving me grief....i can't get onto the internet with XP to update them,because the networking won't work.

anybody have any ideas how to resolve this???