Browser Cache

I'm browsing large files such as 4gig zip files. It seems
that after I "open" a few I'm running out of browser
cache. The winzip program begins to display a blank
window instead of a list of zipped files.

For the application I work on the end user is expecting to
be able to view these files all day long using their
browser without a hitch and they don't expect to have to
periodically clear out the cache.

Any idea how to get around this?

thanks,
Tom