Hi all; The following diagram lays out my home office network (3 Win 98 SE machines, 1 XP machine): Each PC has its own properly-configured copy of ZoneAlarm firewall, in addition to the Linksys router's firewall. While all the PCs can access the internet, I'm having trouble fully networking these machines so that they fully share files: PC#1 (XP) can "see" all other PCs on the LAN, and can copy files to/from them. PCs #2,3 & Laptop (98SE) can "see" all other PCs on the LAN, but can only copy files to/from other Win 98 machines. All XP reference books...