I trained and ran retrievers in field trials and hunt tests for 10-15 years using e-collars extensively. The most important thing I remember being HAMMERED into my head by protrainers (and "pro-amateurs") was that you NEVER train a dog anything new with a collar! You re-inforce what they already know by correcting them when they do wrong! Smart as they are, they cannot figure out why they were "corrected" if they don't already know what they were supposed to do. e.g. You don't just "zap"a dog for running big! You teach them to come to a whistle, (and teach them well)! Then, when they don't respond to the whistle you can "correct" them for failure to do, when they already know what to do. Dogs should only ever be "corrected" electronically for refusal to do what they know is right and for failure to try when they know what they are supposed to do. The collar should be used as an extension of the leash or the long line training, not instead of...
That said, conditioning is a big part in preparing a dog for e-collar use. Somewhere I may still have a video of Mike Lardy's (retriever protrainer) collar conditioning technique which is equally applicable to pointers or retrievers. It is full of great info that is applicable for conditioning any dog! Unfortunately it's a cassette tape nd nobody has player anymore.. It is still available on disc and well worth the price. A mentor to work with is always great help if you can find one.