Searching the Backroom?

[caravel]

Correct - webcrawlers cannot see the backroom because it is a private forum that only members can view - therefore you won't see backroom threads showing up in search results.

You can use the search string miotas mentions however to search the rest of the forums. In fact doing so may be quicker than using the built in search (not to mention less taxing on the server) - for example

rome total war mods site:forums.totalwar.org