Clean the stick, right click and format
Run Your Personal Wikipedia from a USB Stick (lifehacker.com)
Download XAMPP (apachefriends.org)
Once XAMPPLite is saved to your flash drive, to start it up, double-click on the xampp-control.exe
The MediaWiki software is used by tens of thousands of websites and thousands of companies and organizations. It powers Wikipedia and also this website.