Thanks to the power of Google (and a very patient wife!) I’ve managed to set up a portable development and learning environment on a flash drive.

It contains:

• XAMPP (Apache, MySQL, FileZilla)
• SVN via Apache
• Eclipse (Aptana Studio)
• Java runtime for Ecplise

So far I’ve only tested on 2 systems but it appears to work just fine!
Should make this a lot easier than relying on 1 PC to host everything, so long as I sync the drive for backup.