HTTP and HTML question

Hello!
I have been a long time looking for a solution that I can't find without your 
help.
I want to track all the HTML code in a net, and save it to a file. Well, I've 
created some rules, capturing only packages with this filter: "tcp port http"
And then showing only:
http.content_type contains "text/html"

Well, now I see the packages that I want, the problem is to save only the 
HTML. I've tried exporting to PDML and then I can do a XSL Transformation. 
But if the data is gziped, how can I do it?
Please, does someone know how to solve this?
Thank you very much.