g1smd - 10:59 pm on Jun 11, 2010 (gmt 0)
Yes, you must replace the word "Redirect" with the word "RewriteRule" and then code this rule using the correct "RewriteRule" syntax.
The underscores rule is going to hit the skids if there are more than nine in a URL.
Where are the underscores in relation to any slashes in the URL. Is there any consistency, or a pattern? Does the number of slashes vary?
The idea is to document "exactly" what a matching URL looks like and then build a RegEx pattern that exactly and efficiently matches it.