Blizzard Mail Frame Question

[Wickedshifts]

I was wondering if it's possible to edit or even create an entirely new frame to replace the default Mail frame? I ask because I have an idea for an addon (Yes it has been done before, but to be honest I hate running 2 - 3 addons for different functions, when they can possibly be all added together into one single addon) & I think for it to work corretly & even look right in my eyes (Im a very visual person... Yes, I draw my frames & layout on paper before I even start to try & code anything... im a coding newb BTW But want to learn!), the mail Frame would have to be completly remade to fit my UI.