CES VaultWiki rewrite rules help?

This product uses the following convention for URL's
Code:
forums/showwiki.php?title=Glossary:dimmer+beach

I want it to become:

Code:
forums/glossary/dimmer-beach.html

here's what I have so far, but I can't figure out how to make the plus symbol a dash instead.

Code:
'showwiki\.php\?title=(\w):(\w+)' => '$1/$2.html'

Any ideas?
 
To clarify, the VaultWiki product also supports a URL format like this:
wiki/Glossary:dimmer+beach

I don't recommend using vbSEO's CRRs in new versions (2.2.2 and later) of VaultWiki as you might get an infinite 301 redirect (VaultWiki tries to force its own URL to avoid duplicate content). This has happened to a number of people and it's usually not one of the things they think of during troubleshooting.
 
Crawlability