You know, it's mildly amusing that after digging and reading as much as possible on TechNet:
http://technet.microsoft.com/en-us/library/bb124558.aspx
Something as simple as setting up the configuration in this way was probably best described and presented on this post.
Is it just me or is pretty much all the documentation on TechNet written for those people and org's that plan on running an Edge Transport Server and won't be using a single server solution?
I know I'm in the minority here but being a MVP I tend to like to play and run as much insane stuff as possible, the migration though from Exchange 2003 to 2007 has been a real headache on a single server set up. Even when I'm using a brand new server in a brand new domain. If it wasn't for this blog it'd be hell. So thanks a million.