I can't find specs on these notebooks, probably because they are old. You need to find out what NICs are actually in them first.
Do they have Windows on them already? If so you can get this info out of the device manager. Look at the Hardware ID on the Details tab of the NIC properties. Then post the VEN, DEV and SUBSYS numbers.
Alternatively, you can run PCISCAN from DOS to get the hardware IDs for the NICs.
After getting this information, you can do a string search against the LAN Driverpacks. Although Driverpacks is xp32 not vista64, after finding which XP driver it uses, you might be able to find a Vista driver to use with your PE.
http://driverpacks.net/DriverPacks/DriverPack.php?pag=lWebsite that has PCI SCAN