Somewhere along the line your question shifted from "help me hammer out this Regular Expression" to "I need someone who speaks Apache" ;)
For me, looking at a segment like
allow from all
is like a monkey peering at the innards of a watch. "Allow from all"? Why do you need to allow from anyone? ... And that's why you need someone who speaks Apache.
Sometimes more people drift by on the weekend. Unless they're all in Las Vegas.
Is it the <Directory> envelope, the AddHandler lines-- or both in conjunction-- that makes Apache throw fits?