Building a vulnerability scanning laptop with XP

I'm building a new laptop that will be used to conduct vulnerability analysis scanning. Due to the constraints, this will be an XP laptop. I have a laptop in use that uses linux, so this laptop is meeting a different set of needs. I've been compiling a list of applications to load on the laptop, and this is what I've come up with so far:

• A network vulnerability scanner - TBD - I'm looking at SAINT, Nessus, and Retina
• Microsoft Network Monitor - I've never used this, but I could see scenarios where it would be useful.
• Wireshark - a great open source packet capture and analysis tool
  
• Oval - for host base vulnerability checking
• I'll have a couple of SRR scripts on the laptop (unix, SQL Server, and Oracle)
• NMAP - for scanning
• Netcat - because it is the Swiss Army Knife of network tools
• NetStumbler - for war-walking
• TruCrypt - for data at rest protection

Yes, you will have noticed that the majority of the applications are open source. The scaner will probably be a commercial application as I need something to do the heavy lifting.

If you can think of something I'm missing or something that might be useful, let me know.