How do end users run Unity without administrator rights?

It's odd that I don't see a forum for really basic questions.

I have installed Unity on 2 user machines as administrator (on XP Pro) as the users are restricted from installing it themselves. Which files need to have their permissions changed in order for the end users to run Unity without starting IE with the runas command and giving it administrator rights?

I just hate it when I ask an obvious question but can't see the answer to save my life. The users need to have read an execute rights in the /program files/unity and all sub-folders. That hit me about a half an hour after posting the question. Duh.

Waaay too tired.

This is for Mac’s correct?