did you remember to enable file and print sharing, retsartt after that, then share which drives and directories you want to see over the network? what logon are you using, Client for MS networks or standard windows logon? i knopw Client for MS is in your list but in the box under installed components you should see Logon type - make this Windows Logon, then edit it's properties to "quick logon"
from the face of it you seem to have it correctly configured, not quite the way I'd do it but good enough
but you'll se jack s*** if you don't enable file and print sharing, then share something. obv the network itself works because you got the pc-name clash which temporaily disables the NIC, so you did that right.
the diff between PCI nics and ISA nics apart from the bus/slot they use, is that PCI combo nics auto-sense which connection youre using, BNC or UTP, while ISAs usually don't, they have to have to have their EEPROMs flashed via the setup utility on the driver disk. but I don't think this is your problem.
hey don't fret! you're doing really well. you're almost there!