this is really really really ridiculously easy.
i did it. took all of 15 minutes. to swap the cases out and in. i still need to hook up my shifter though. i have the 5-speed trans and the shifter is made to mount to an auto, but the guy i got it from had it mounted up in his B2 that was a stick.
12 step program
1. SAFTEY! apply parking brake. chock the tires. use jack stands and all that good stuff.
2. drain fluid
3. unbolt the rear shaft from the case
4. unbolt the front shaft from the diff
5. slide the front shaft out of the t-case
6. unplug shift motor
7. unbolt electric t-case
8. move that crap out of the way.
9. bolt up manual case.
10. slide/bolt drive shafts back in
11. install shifter/fill with fluid
12. drive and enjoy.