1) Client for Microsoft Networks.
2) File & Printer Sharing for Microsoft Networks.
3) Internet Protocol (TCP/IP).
Not sure what you are trying to ascertain because XP SP2 already has all that you need. Obviously you have to install a Wireless Network Adapter (802.11g), but this only need have its drivers installed, not any proprietary wireless networking software. Windows' built-in Wireless Zero Configuration software will generally be better than the software provided with the WiFi adapter.
You can run a Local Area Network for File & Printer Sharing with IPX/SPX protocol instead of TCP/IP, but the internet does require TCP/IP.