good source of free AV rescue ISO

Today I was working on a really nasty virus that got onto a Windows XP machine, bypassing the Symantec Anti-Virus program and installing a root kit as well. Once installed, it owned the machine, blocking any removal tools from running in safe mode or regular mode. What a nightmare. My thought was to use a rescue CD to scan it and hopefully remove it. I downloaded Kaspersky rescue CD and began scanning it in a Linux Kernel. I had to leave the client because it was going to take a long time and I didn’t want to charge them to sit and watch a screen, but I wanted to document a good source of these CD’s at askvg.com