Allright mate, I am just about getting to this stage aswell I cant really give any advice because I know about as much as you on the subject. Allthough from what I have heard, read and watched you seem to be on the right track. I would say try and get a copy dave lissets Dvd set. Dvd number 3 covers all the aspects of getting your dog dropping to shot etc... The dvds are a pretty good mate explains everything properly and clearly well worth a watch.
Regards Ben