Network wizard help

My main computer is a dimension 8300 running Wxp. I want to network it with one inspiron 2500 running W2k professional. I successfully set up a wireless g router and notebook adaptor and both pcs are now sharing an internet connection. The main 'puter plus cable modem are wired. The inspiron is in another room. I began to run Network Setup Wizard from the main computer. When I got to the last step requiring a network setup disk to be made or running the WXP disk on the second pc, i discovered neither option is good for me. I do not have a floppy drive on the 8300 and the XP disk alerted me that network setup wizard is not supported on W2K. It says instructions for configuring a network can be found in the help files for W2K. I can't find them. I also don't have the original  W2k professional cd for the inspiron so if that's needed, I'm out of luck.  So what I can do next?  I want to share mainly music files,  internet favorites and be able to check my outlook email between the the two pcs. Thank you