Hi, I've got another problem which I can't figure out!

I've got an Apache 2.2 reverse proxy requesting content from a Tomcat 5.5 server. I need to change the response headers of the content that is returned, but mod_headers and mod_expires doesn't seem to be able to do that.

Does anyone know of a third party module that can change the Cache-Control, Expires and ETag response headers of content retrieved through a reverse proxy before it's cached and returned to the agent? Has anyone made or seen some kind of source code hack to achieve this? Thank you!