yes, you'll need to change the driveshaft as well.
This is a major operation. There are one million big and little things that need to be changed, including the transmission tunnel (the manual will not fit in the automatic body), the exhaust, the wiring, instrument cluster, ECU and so forth.
You´ll need a manual transmission donor car as parts source. If you don´t have access to one - get one first.
My advice: Sell your automatic car and buy a manual.
Ronny Enzmann has done this before -
click here for the thread where he describes how he`d done it. Quote: "I would not do this again", and he´s got lots of experience as well as acomplete donor car.
There´s a shop in the US that has done some conversions. Check out their website for some pictures and additional information:
http://www.germanautoconnection.com/5-speed_conversion.htm 
