MUST Read document on HTTP.sys Vista and Longhorn.
http://www.microsoft.com/downloads/details.aspx?FamilyID=311f4be8-9983-4ab0-9685-f1bfec1e7d62&displaylang=en#filelist
W2k3 sp1
http://www.microsoft.com/downloads/details.aspx?FamilyID=a3da3d7f-18c7-45ce-a47a-ed747dacef34&DisplayLang=en