Trying to configure mcafee firewall to stream music from laptop (vista) to xbox 360.

I'am using the following 2 guides to help me with the process:

http://www.microsoft.com/windowsxp/mediacenter/extender/setup/firewall/mcafee.mspx

http://www.microsoft.com/windows/windows-media-center/learn-more/extenders/help/extenders-firewalls.aspx#Find


So far I have found that turning off the firewall completely allows me to stream music ok.  However I don't want to have to do this each time I use my xbox.  Also I don't want to set up media centre on my xbox.  I just want to stream music on the simple player found on the menu when pressing the guide button.

Referring to those guides:

I have allowed all services on Mcafee except:

Mcrdsvc.exe
Mcxnettw.exe

I cannot find these on my computer!

I have looked in the c/windows/ehome folder as suggested but they are not there. 

The other guide suggests some different applications - system is the only one I can't find (it doesn't mean anything to me).  I have tried entering the ports into the firewall configuration to no avail.

Please help!

Using:

Windows Vista Home Premium
Mcafee Security Centre v 9.15
with Mcafee Personal Firewall 10.15

Regards,