Vista - Vista dual boot problems installing lan on XP prof

I have a Toshiba A120 with Vista installed. I have created a dual boot with
XP Prof. I seem to have all the drivers installed except the wireless and LAN
driver. I downloaded the LAN driverfrom toshiba supportt page there is no
setup.exe file. No problem, (I think, perhaps someone out there knows
differently?). I used device manager to load the inf file and I selected
intel pro/1000 PL network connection with the install hardware wizard. On
completion the wizard says there was an error code 10 and that the device
probabily would not work properly. Can anyone help? It sure does not work! By
pure luck I purchased a port replicator, its LAN works with XP but does not
work with Vista!!! Is there anyway that I can get details on the LAN device,
like model, serial number.

Any help gratefully appreciated.