Setting properties via email

I’m trying to implement:
http://wiki.bestpractical.com/index.cgi?SetTicketPropertiesViaMail
to be able to set the owner via email.

I must not be as familiar with RT as the instructions are a little
general in some cases…" I then have a normal Scrip AFTER this that
executes of On Correspond Requestors and CC’s Template Correspondece."
I’m not sure how to do that piece.

Are there any more in depth instructions or recommendations on how to
accomplish this?

Thank you.

-Brandon