I am planning on adding heated grips, low wattage fog lights, and a 12v cigarette lighter to my GS.  I know very little about electronics, but think I should use a relay with the fog lights, but what about the grip heaters and cigarette outlet?  Also is the kit below worth buying?  It comes with five relays and harnesses and I figure if I use 3 the other two I can use as backup.
http://www.amazon.com/Pack-Relay-Harness-Bosch-Style/dp/B005HFYE1O/ref=sr_1_3?s=automotive&ie=UTF8&qid=1331695497&sr=1-3

I also found the diagram below on how to wire fog lights.  If i use a relay for the heated grips, is the wiring the same except grip heaters instead of fog lights?  And below is the IGN the orange wire behind headlight I have read about?  Thanks in advance!