Reverse proxy Frog to a subdirectory with Apache?
We have Frog here, and we also have a domain which we want to run the site on. However, we don't want to dedicate the domain purely to it - we already do various reverse proxying things with it, pointing to various services in school (housepoints system, oliver library etc...). So what I want to do is reverse proxy http://domain/site to be the frog server, and then put a html redirect at the root of the site, leaving everything else intact.
However, Frog does various things by absolute paths - images stored in a user's area are under /user/blah, some system icons are in /sysicons and /sysimages etc... Meaning they are trying to access http://domain/user rather than http://domain/site/user.
Anyone got any ideas how I can overcome this? I've only ever done simple reverse proxying using 'ProxyPass /blah http://10.5.4.1/blah' and 'ProxyPassReverse /blah http://10.5.4.1/blah'.