Layout help

I love mailmate - especially the correspondence window - I typically have emails from a number of clients and repeat customers - so I file the email in a folder and progress it through a system - quoted, then invoiced then despatched - with other folder if waiting for the customer - etc.

What this means is the correspondence window is the most important part of Mailmate for me - so how do I put it at the top and full width with "source mailbox column always present ? and then have the normal mail window bottom left and mail content window bottom right ?

I have a pdf that better explains this

Thanks,

Malc