There is a great article for the transmission removal of a C2, but I'm wondering, other than the additional removal of the front drive shaft, is there a difference in the removal process. I know the engines are different, but I don't know how that might effect the clutch or transmission mounting in a TT.

FYI, here is link to that process. http://www.c-speedr.com/howto/996rms/rms1.php

 

The gearbox is different also, it sits only with 4 bolts to the engine.
Also you must remove the clutch slave from on top of the gearbox, the gear fork hinge (which is a pain in the ***), the starter and the front driveshaft as you mentioned.
There are several 996tt DIY's available in here if you do a litle search.