Three sources:
1. http://www.rockshox.com has all the technical service manuals and downloadable PDFs.
2. Look on YouTube, Rockshox has uploaded step by step service videos, just search for Rockshox they should come up.
3. http://www.enduroforkseals.com has an illustrated walk through on one of the RS forks I think.
I'm guessing the leak is coming from under the floodgate adjuster knob? If so, the easiest way of sorting it out is to stack another o ring on top of the existing one, or a small washer/spacer. The o-ring needs to be slightly compressed, but the floodgate adjuster can move up and down, so there's excess clearance and oil gets forced out under compression.
Just done that with two RS forks. Very straighforward to work on, circlip plier will make your life a lot easier.