Win 2000 Pro & XP Home Network problem

I have a Win 2000 PC connected to a D-Link DI-624 Wireless router via CAT5 and a Laptop running XP Home connected to the router either via the wireless or CAT5. (The router connects to the internet via a remote LAN server which distributes the internet feed.) The CAT5 with the internet feed connects to the router via port 1 not via the WAN port. So, the wireless router is effectively just being used a switch.

How can I get create a SOHO LAN between the laptop and the PC to share files please?

I have tried the network wizard on the XP machine but the netsetup disk created is not acceptable to the Win 2000 machine.

Neither machine can see the other.

Your assistance appreciated.

Marcus