Rar, i'd suggest at least getting a friend that has done some of this stuff before...
Also, Turfburn's how to starts with the gear box still in the car...just look for it in the stickied how-to list...
the issue is that there are no 'standard' instructions for diy type of guys; inside the gear box i mean...you can follow the FSM, but it'll be suggesting a SST for nearly every single thing you'll do...which gets you no where...the How-to's will help, but the bigger problem is that you're not going to be fully aware of what actually broke...there could be pins or detents that were destroyed with whatever did break, but you may not even realize it...and putting things back together may result in the same thing as soon as you start driving...
good luck man...hopefully its a simple fix.