replacement for AngryIP Scanner?

I am looking for a way to get a list of all logged on users, their computer
names, and IP addresses on our LAN. I was using AngryIP
http://www.angryziber.com/ipscan/ but it doesn't seem to scan past the
client-side firewall inWindows XP sp2. To be more specific, Angry IP scan
results show the IP and computer name but NOT the username for any WinXP
computers with sp2. I'm uncertain about the continued development of that
great little utility. Optionally, I have looked at the Shares plug-in in
MMC but that does not seem to have this info. Also, ShareWatch
http://www.stevemiller.net/sharewatch/ works but generates too much info for
my needs. I really just need username, IP, and computer name in a simple
format like AngryIP. I use AngryIP to get my usernames and LAN IP, then I
VNC the computer to offer user support. Very handy. Suggestions? Thank
you.