Like Anz said, the DET tranny wont work...for reasons that elude me but others have tried and it doesnt work.
So youll need a manual tranny, pedal assembly, hydraulic assembly, shifter and linkages (unless it comes with the tranny), possibly the following, Flywheel, clutch, pressure plate, motor mount, etc....
This is a pretty major task, I know im researching it myself. Plus you have to decide if you want an LSD tranny or not.
I've been thinking about switching my car to manual also. Do you guys think a place like AAMCO would do a good job of doing it...they might give you a warrantee or something. Also would we have to supply the transmission to whoever does the swap?