if-modified-since IIS 6 syntax

[nmisupport Profile]

Does anyone have the correct Rewrite syntax for if-modified-since 304 response? Specifically we are on IIS6 and want to support the google webmaster rcommendation.

[HeliconAndrew]

Very unique question... can't remember of anything like this being done. What exactly are you looking for? Could you provide an example?
I assume you want to fetch header, you can try using http://www.helicontech.com/isapi_rewrit ... Header.htm

Regards