Straightening? Some of the other guys will have to chime in on that one, I've never done it, nor seen it done. I would highly suspect though that there is absolutely no way to get them as straight as they were.

We use FerrlTite (sp?) at the shop, over a small alcohol burner. Lets back up though. After you cut the shafts to length, you need a champhering (once again, SP??) tool to de-burr the inside of the arrow. Once that's completed, then your ready to glue the inserts. I know this sounds elementary, but I've seen guys burn their fingers because the are holding the insert directly....DO'H!

Hold the insert with some pliers, gently...heat the glue and the insert, but don't hold the insert directly over the flame. Once the glue melts, apply a small amount of glue. You're ready for the arrow, and this is where practice comes into play. You'll need to keep the glue melted while installing the insert. Again, you don't want to directly heat the insert or the arrow...Aluminum will melt. Insert the insert (lol...wow, that sounds funny) while spinning the arrow to evenly distribute the glue. Seat the insert and allow to cool. Then scrape off the excess glue.

There's really not much to it, but it takes a gentle touch so as not to melt the wrong stuff. I would maybe start out w/ some junker arrows that you don't mind ruining. Once you get the insert in, screw in a point. From there, you can heat the point which in turn will melt the glue, and you can remove the insert. Good practice.