[rwest]

Kirk,

You're correct that the big pipe is the toilet, small is shower and the stub in wall would be the sink drain.

One way to tackle this might be to go down to your city or county and get a permit and ask if they would come out before you start and give your rough ins a quick look over and give you some guidance so you do the project right.

Some things to keep in mind and your floor tile comment is actually a good one: you'll need to know what your finished wall and floor dimensions are so you can cut the stubs and install the toilet flange and shower drain right.

Good luck,
Rutager