It may be time to switch IT service providers. Since your forums are so basic, exporting your data to other forum software should be a weekend project. (Configuring the whole thing, testing, and taking it live will be a week's work or so.)
I was once quoted $100 000 to port an in-house ERP package to another platform. (By the original developer, no less.) Dissatisfied, I mentioned my dilemma to an admin person over lunch. She gave me the number of a pair of software engineers (from her church, go figure) who did it for six thousand in their spare time. I paid them a 50% performance bonus and put them on a retainer. The IT Service sector is like that: some people are stuck in the 80's mentality of every project being a massive foray into the unknown, and every specialist writing his own ticket.
If internal politics prevent you from making the needed update, here are a couple of stopgap measures you could implement:
Real boolean search would make a huge difference. Huge. The BPL forums are the greatest store of knowledge on this particular subject -- but unfortunately most of it disappears when the thread gets to the bottom of the page. This makes it all that much harder for new users; they're not "up to speed" yet and they can't find the relevant threads to give them the needed background.
Consolidate some of the lesser-used forums. Technically, almost every post here relates to either "gear" or "technique". Is it necessary to have a Winter forum and a Winter Mountaineering forum? Most people know that if they don't post to The G Spot, only a small fraction of the readership will read their question.
Finally: change the name of The G Spot. For those of us trying to bring loved ones into the world of outdoor recreation, that label is just one more hurdle. For instance, I won't introduce my girlfriend to the forum because of it.*
*The last thing I am is a prude, but it's not me who is uncomfortable with this label. Most of us have mothers, sisters, wives/girlfriends. Naming the main forum after a section of the vaginal canal just reinforces so many of the stereotypes associated with outdoor people. For some women, it makes this sound like a man's club of manly men doing manly things and joking about vaginas.