floid78 - 11:26 pm on Oct 13, 2013 (gmt 0)
Why are you changing URLs at all? Why not keep the old URLs and rewrite to the files' new location? If you do want to change the URL, why not take the opportunity to change them to something pretty and user-friendly?
I guess I should have explained better. Unlike vBulletin 3.8, vBulletin 4.2 has a build SE-friendly URL function. With vB 3.8 I was using the described addon called "Zoints SEO". I really can't say much about the problems you described with that old rules, I only know they came with the addon, and they actually did work, and rewrote the standard vBulletin URL's to the format that I posted.
I now would like to use the build in SEO function, which has a different URL format, and still keep the old URL's by redirecting to the vB standard URL's with query string, which than should be rewritten to the new SE-friendly vB URL format.