opting out of deflate mid request

I have a particular cgi, running under registry that uses
Content-Disposition: attachment. Unfortunately, it appears that IE6
ignores the header if the page is gzipped. So I was wondering if
there was an easy way to keep the deflate filter from running on a per
request basis. I've worked around this in the short term by altering
httpd.conf, but ideally i think it'd be useful to be able to short
circuit this thing mid request if possible.

Adam