Slightly off-topic, unless the script will be used in the wild.

Autorun with USB media sounds excellently geeky, like arstechnica.com's recent USB drive comparison where they made a RAID 0 drive with two different USB drives on OSX :) However, I like many people, have turned off autorun, and I can't even remember how to turn it back on! This stops weird things happening when you insert music CDs which also have videos and you don't have to wait for some install interface to appear when you only want to find one particular file on a software CD.