If you have a vise, a drift pin punch slightly smaller that the old pin, some heat, preferable oxy-acetylen and a big hammer you should be able to get the old pin out. You'll use the drill to ream out the holes to accept the new pin. I didn't use the included brass inserts as they require a bit more tweaking. My doors work fine but be sure to grease up the new pin before you pound it home.
If you don't have items 1-4 you might be wise to bite the bullet and let a shop do the install. The heat will almost for sure be necessary. Hope this helps.