I just hit the kill switch to kill, and tap throttle to re-start. Keeps the all-important mpg meter running, not to mention the airbags.
See this thread, which summarizes my thoughts on P&G above 40mph:
http://ecomodder.com/forum/showthrea...p-g-13206.html
For FAS, you should build yourself one of these:
http://99mpg.com/mima/thefassystem/