mod_rewrite with mod_proxy

[Jiminald]

Hi all,

I am currently reverse-proxying to access a resource. This is located by going to

http://localserver/resource

getting pages from

http://remoteserver/resource

.

This all works fine, but, the resource I am accessing states in the config you need to type the whole url to the resource. For example:
$SiteURL = '

http://remoteserver/resource';

The data the resource creates in the database uses this variable and statically links images and any other items it can, using the whole path.
It is highly unlikely that I will not be allowed to edit the database. Its huge and I don't think anyone would be happy, especially if it dies or has to go offline for a bit.

So I need to rewrite

http://remoteserver/resource

to

http://localserver/resource

I was wondering is this possible to resend back through the proxy?

I hope all this makes sense and thanks in advanced