You've given a great description of the network setup, Lisa, and I
think that you're close to having everything work.
Remove the NetBEUI entries from the win 98 machine. TCP/IP is the
only protocol that you need, and using more than one protocol can make
a Windows network unreliable.
Yes, the Internet Gateway is your router. Clicking that icon lets you
monitor and control the router's operation.
What happens if you type the XP computer's name in the Start | Run box
on the win 98 computer in this form:
\\computer
If it shows you the XP computer's shared disks/folders, then all is
well. If it says that the network isn't available, the problem is
probably that the user isn't logged on. Is there a logon prompt when
win 98 starts? If so, don't cancel it. Complete the logon by
entering a user name and, optionally, a password. If there's no logon
prompt, click Start | Log Off and log back on. If that makes network
browsing work properly, the most likely fix is to go to this registry
key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
Network\Real Mode Net
and delete the value named "AutoLogon", as shown here:
http://www.wown.com/j_helmig/nologon.htm#AutoLogon