Its not that difficult really, and nowhere near as many things to consider as when setting up geared systems.
If you are using a SS kit on a freehub, with the spacers that fit on the freehub, just shuffle them and the sprocket around to acheive the straightest chain with the chainwheel.
This is assuming a "magic gear" or verticle droupouts. If you have a tensioner, you might have to either adjust that to suite the position of the chain, or fiddle with the spacers a little more to get it lined up.
Chainwheel can be fitted either inside the cranks (middle ring) or outside (large ring) to get the best results
G