Dont get me wrong i wasnt taking the P, it was just funny at the time.
To repin the cyl it is a little more involved than a normal one but still easy if you know how,
I had the same question ages ago and was pointed to this thread, http://www.lockpicking101.com/viewtopic.php?t=5199&highlight= sj has done a great job with the write up and should tell you everything you need with pics as well,
The best tip i can give is to make the clip he explains and dont buy it, the home made one is just as, if not better than, the bought ones and will save you a lot of time.