IE8 Blocker Toolkit:
Toolkit to Disable Automatic Delivery of Internet Explorer 8

Supported Operating Systems: Windows Server 2003 Service Pack 2; Windows Server 2003 Service Pack 2 x64 Edition; Windows Server 2008; Windows Vista; Windows Vista 64-bit Editions Service Pack 1; Windows Vista Business 64-bit edition; Windows Vista Enterprise 64-bit edition; Windows Vista Home Basic 64-bit edition; Windows Vista Home Premium 64-bit edition; Windows Vista Service Pack 1; Windows Vista Ultimate 64-bit edition; Windows XP Professional x64 Edition ; Windows XP Service Pack 2; Windows XP Service Pack 3

Download:
http://www.microsoft.com/downloads/details...;displaylang=en