It's very easy. For winxp You can find "advanced tools" on the menu after you enter the properties window of "wang3 luo4 lin1 ju1",then you can find an item named network ID or something lick this there you can set the name of workgroup and your ID. for win2K, thsi option is under the SYSTEM configaration in COntrol panal. Set the same workgroup. Then share a folder in XP, you may see it from 2k, if not you should do something more. I can't say clear here, so wait for me.