I just had to create a bootable CD/DVD to offline clean a PC of a friend of mine. So I installed and used the Microsoft Malware Removal Starter Kit:

Based on the Windows Preinstallation Environment (Windows PE) kit, great collection for creating a rescue and cleaning disk. It is also very easy to add your own favorite tools as well.

http://www.microsoft.com/downloads/details.aspx?FamilyID=6cd853ce-f349-4a18-a14f-c99b64adfbea&DisplayLang=en

Additional resources for this topic:

The Antivirus Defense-in-Depth Guide:
http://go.microsoft.com/fwlink/?linkid=28732

The Responding to IT Security Incidents page on Microsoft TechNet:
http://www.microsoft.com/technet/security/guidance/disasterrecovery/responding_sec_incidents.mspx

The Windows Security Resource Kit, Second Edition from Microsoft Press:
http://www.microsoft.com/MSPress/books/6815.aspx

Urs