I didn't know what the policy was on posting links.
Here is the link for drivers to get your WCF12 card to work with PPC 2003
http://www.senao.com/service%20&%20support...WinCENET400.zip
Remove the card from the slot.
Run setup
Insert card.
When it asks for a name, type in "wlannds.dll"
Do a soft reset
When you do the soft reset, there may be an error message about cannot find a file. Click OK. If want to stop this message from coming up, remove the shortcut from your windows/start up folder (none of the card utilities work).
PPC 2003 should pick up the signal now
Linksys has beta drivers, but I haven't had any luck using these
ftp://ftp.linksys.com/beta/SW_CD_Beta081903PPC2003.zip