Help with RegEX and Transport Rule Exch 2010

I'm trying to setup, what i believe, is a simple transport rule for my exchange 2010 environment.

I need to add a CC to any incoming mail being delivered to an email address that begins with the letters PYR.

I've setup about 25 mail-enabled public folders which all begin with PYR. As an example, pyr-addressa [at] site.com, pyr-adressb [at] site.com

I now have to copy all messages being delivered to anything that begins with the "PYR" to another email address. I've read the technet pages on the definitions of the regular expressions and the variants I've tried are just not working:

\(PYR\) or simply PYR.

Best,