I’ve found a really nice program launcher for Windows XP: Launchy. Launchy won community choice award at sourceforge this year. See how it works: http://launchy.net/#screenshots and Learn how to use it: http://www.lifehacker.com/search/launchy/.

If you are using firefox quick search, launchy is extremely handy. Plus, launchy comes with preinstalled skins, so no need to search, install, and see how each skin looks. Great!