Forum Moderators: Robert Charlton & goodroi
Would a site possibly rank significantly higher if phpbb forums were removed?
Also, some of the sections of the forums are ranked highly by google for niche keywords, so I guess I want a bit of both -- the benefit of forums boosting ranking, but not the problems associated with keywords and internal links in each post. Maybe that is not easily possible.
All this because of having phpbb forums and not knowing how to make google look at them separately from my site
To me, it doesn't sound like this is the issue at all. Cleaning up the display in Webmaster Tools isn't really the problem ;)
It sounds to me like you have poorly optimised forums - you should perhaps looking around for any specifics on tidying that up, and I would certainly advise that before you start switching to subdomains or something similar. It looks like quite a few other members use the software, incidentally:
[google.com...]
Personally I think it's better to leave the forums wherever they are and tell Google to not index the duplicate URLs. Keep it simple.
Here's a snippet from my robots.txt file to help block duplicate URLs and unimportant files as part of phpbb's install.
Disallow: /forums/faq.php
Disallow: /forums/groupcp.php
Disallow: /forums/login.php
Disallow: /forums/memberlist.php
Disallow: /forums/modcp.php
Disallow: /forums/posting.php
Disallow: /forums/privmsg.php
Disallow: /forums/viewonline.php
Disallow: /forums/*view=previous$
Disallow: /forums/*view=next$
Disallow: /forums/*start*
Disallow: /forums/viewtopic.php*p*