Screencast: Install Internet Explorer on OSX using VirtualBox (updated X2) | 10 Volt Media Blog
http://www.10voltmedia.com/blog/2008/12/screencast-install-internet-explorer-on-osx-using-virtualbox
"In this screencast I’ll show you how to set up a virtual machine for Internet Explorer 7 on OSX in about 15 minutes without spending a penny."