There isnt too much to it. Just leave the old cable on and route the new one beside it. Once you have the path, secure the cable to the frame so it does not touch the engine. If it touches, the sheath will melt and water can get in and rust the cable.
Now loosen everything up and remove the old cable and hook up the new one.
From there, look at page 1 and 7 and it gives really good instructions on setting things. You shouldn't go wrong.
The ride IS the adventure. The destination is just to get gas!