Then again, nothing too much directly related to rigids, but sometimes I jump the gun, so forgive me if they don't help at all.... sorry...

Sure!

Here's a few that might help:

http://www.aliaswavefront.com/en/Tmpl/Maya/html/index.jhtml?page=/en/Community/Learn/how_tos/how_tos_m.html&style=normal
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