i just set up my 2Xp pc's and one windows7 laptop peer to peer for file and printer sharing but i can not configure internet connection for those pc's so any help? pls!!!
Try addiding a second network card assuming you are using cat5 LAN, not wireless.
Then connect the internet to that card, not your switch, with DHCP enabled in TCP/IP.
Enable internet sharing on that PC and that's it.