g1smd - 1:42 am on May 2, 2011 (gmt 0)
This RedirectMatch code isn't useful for the current problem. Actually, the discussion about RegEx patterns is very useful, but the OP needs a RewriteRule here. The OP wants an internal rewrite, not an external redirect.
My original code included !^ meaning does NOT begin with. That is the key to getting the original code working.