The thing with the Noble is that it's another "traditional" style twin-turbo setup, in that it uses one turbo to spool up the other. It's not exactly the same thing.
The Audi setup is a single turbo for each cylinder bank. Not 2 interconnected turbos for both, but one for each. Nevermind... there was a picture.
About the intercoolers fitting (who said there
had to be intercoolers anyway?), I'm sure if you moved some of the larger engine bay components out of the way (IAT, MAF, filter, coolant reservior, battery) and with a little bit of imagination, you can see how an intercooler might fit between the motor and the wheels on either side.
It's a stretch, but... on the pipes -- I don't know if there's a certain amount of length required -- but if you could keep the pipes rather short coming from the exhaust and going to the intake... this
could be possible.
My reason for posting this (aside from my love for efficiency

) is that it seems possible that you could set a lower PSI and get equal or greater output than a single turbo or traditional twin.
.RMk..