Sorry Ed but I also totally trust plug/patch combos, hell I've run just patches and have been fine. Besides, again for the hundredth time, the worst case scenario is that he gets another flat. No "sudden tire failure", no blow out, a flat is the worst that can happen.
Anyway, rough up the interior of the tire, use plenty rubber cement, remove backing, push point through hole, pull with pliers, use something to "roll it out". Cut off excess rubber to about 1/8''. I've seen guys heat gun them but I don't know if it's necessary... I usually let it dry for an hour or so for piece of mind. Reassemble and take off.
I know that a lot of people have been made to believe that motorcycle tires can't be patched... gee I wonder whom perpetuates that rumor? Everyone seems to think that MC tires endure some super extra duress or abuse. You can plug/patch an 18 wheeler tire which far greater stress than a MC tire. As far as "compound" goes, the plug is certain to be softer in any case and it's about 1/16" in diameter...
What always totally kicks my ass is the fact that in every motorcycle shop in the country, the mechanics all have a pile of almost new tires at home from guys replacing tires because of a flat. Every MC tire manufacturer okays plug/patches and they sure wouldn't if there was ANY danger whatsoever.