What operating system are you using? What kind of router? Here is a link to help with sharing printer on Windows XP. www.microsoft.com/wind...july2.mspx
Here is a link about file sharing. compnetworking.about.c...pfiles.htm
Both links are for Windows XP. Also be cautious about file sharing as you can open your computer up to everyone if you are careless. Make sure you have an anti-virus program installed along with several other security programs such as Ad-Aware, Spyware Blaster, Spybot Search and Destroy. Use a firewall of some kind. Make sure your router is secure. Most people who use wireless don't use encryption which is problematic as wireless networks are much less secure than wired networks. Just a few things to consider.