my puppy bites a lott.

Question
hey i have a labrador puppy which is about 6weeks old.He's perfectly healthy(touch wood!) and playful as well.His vaccinations are due in a day or two.My vet when she examined his behaviour said he would have to be an alpha male has he exhibited a lotta signs of those shown by alpha dogs.The most important and the latest one also being that he was seen humping on a couple of occasions on a pillow kept on the floor for the puppy. He really bites us a lot and i have provided him as of now with about six to eight chew toys as well..but everytime i even replace my hand woth a chew toy he drops the chew toy and comes lunging back for my hand (or leg or any part of my body).I have tried different techniques with him like reprimandng him in a firm and stern voice by saying "NO" whenever he bites me,and also catching him by the cruff of his neck the same way his mother would and repeating "NO". All this hadn't helped and now we just read in a book that yelping when he bites and then ignoring him after he's done that will help him inderstand that he's actually hurt one of his pack members and also not giving him any attention would make him come back to us and ask for attention thus enabling him to understand that biting us is not a great way out.But i am really disappointed with the outcome of this as well...he just does not seem to be bothered even if we walk away.He comes back running to bite usand just does not listen even if we pick him up when he does that.
Someone also suggested gently slapping under his jaw and repeating a "NO" so that he associates that with a bad act.But none of this has helped.Moreover his jaws are really strong and his bite is razor sharp...so none of his bites are ctually tolerable for any of us.They actually leave really red and deep puncture marks after he bites us.
Please please please help me out on this one...Also this thing of the alpha dog is really bothering me. He does things as per his own will and even after repeated commands for him to change there doesnt seem to be any improvement worth talking of.NOt once has he ever licked us when excited,all he has done so far is bite us.Whether it's the face, the hands,the legs wherever,he's not licked us even once.He also does not wag his tail too often when he sees us. My friend has a labrador puppy of around the same age but his puppy actually come running when called and llistens to all his commands. It's also very loving and affectionate and vigorously wags it's tail ad licks him when he comes home.Can i never expect my puppy to do the same ever???Wob't he be as expressive and affectionate as this other pup?Aren't alpha dogs affectionate at all??
pls pls pls help me out n this one...this guy has an excellent lineage (father english and mother australian) and is perfect if not for this small problem.Pls temme how should i handle him and train him to listen to me.
thanks a lot in advance.
-n.

Answer
Some puppies are much more difficult than others.  Usually the English Gentleman's Labs make nice dogs.  That doesn't mean it will be easy.  Don't worry too much about that alpha thing.  Instead start teaching him you are top dog and being obedience training.   The dogs see all the
people and dogs in the household as a pack with each having their own rank in
the pack and a top dog.  Life is much easier if the 2 legged pack members
outrank the 4 legged ones.  You can learn to play the role of top dog by
reading some books or going to a good obedience class. A good obedience class
or book is about you being top dog, not about rewarding standard commands with
a treat. Start at http://www.dogsbestfriend.com/  Keep the training sessions short, only a few repetitions at a time.  A few minutes here and there, and you will have a well behaved puppy before some people even start.  

Young Labs, which I know best, and other puppies tend to very bad about
biting.  You see a litter of them, and all the ones that are awake are biting
another one or themselves.  I am not even sure they realize that when they are
alone, if they quit biting, they would quit being bitten.  At 3 to 4 months
they are getting their adult teeth, and it seems they spend every waking
moment biting or chewing.  I maintain a Lab's favorite chew toy is another
Lab.  Otherwise they settle for any person they can.  They keep hoping to find
one that won't yelp and jerk their hand away, or growl "Bad dog." and clamp
their mouth shut.  Then offer a chew toy.  They keep trying despite hundreds
of corrections.   Another good technique is to quit playing and go away.   Be
sure to praise them when they are playing nice and not biting.

You just have to keep on correcting them, hundreds of times, not dozens.  Don't hit him.  That will only make him afraid of your hand and will not shorten the time it takes to teach him not to bite.  Provide sturdy, safe toys such as Kongs and Nylabones.  Avoid things they can chew pieces off and choke on them.  Keep them away from electrical cords.  Crates are essential for most young Labs and other dogs.

The pet stores are full of toys that many dogs will quickly chew up into
pieces they could choke on or cause intestinal blockages.  If you are not
there to watch, stick to sturdy stuff such as Nylabones and Kongs.  Keep a
close eye on chew toys and quickly discard anything that is coming apart in
pieces.  Rawhide is especially bad because it swells after being swallowed.
These problems are the worst with, but not limited to, large, aggressive
chewers such as Labs.

Ropes from the pets' store quickly turn to hazardous shreds.   Ones I made
lasted much better.   Go to a hardware or home center that sells rope by the
foot.  Buy 2' of 3/4" poly rope.   Melt the ends, and tie  knots in it.   Get
them as tight as possible, put it in a vise and pound it with a hammer.  Watch
carefully, and be ready to discard when it comes apart.

Arranging times for him and your friend's puppy to play is a great idea.  If they are able to have a good time biting each other, they will be more content not to bite you.  It should be Ok as long as your friend is careful to get his puppy's shots and not expose it to strange dogs that don't have their shots.