[andyaties]

I have a similar query: I can install into “/bbpress” on my web root, but the installation just won’t complete if install to deeper folders, eg: /network/members/bbpress where there is .ht access security.

Also, I’d rather it was all in /forum rather than /bbpress. Unless all hrefs, includes etc. are purely relative, that would require trawling all bbpress files for this reference to change it (?)

No – you can’t just rename the root after installation and return to reconfigure the install root setting: it all gets lost in itself.