Don't be fooled by their stubborn nature, they are EXTREMELY intelligent. Here's an example:
When Thunder was about 1.5 years old, I took him for a walk, a long walk, and I went to a part of town that I knew he had never been before. It was snowing and we had a good 2 mile walk. After about 2 miles, I got tired and wanted to go home so I merely turned around and said "let's go home" and I'll be damned if that dog didn't lead me straight home the same exact way that we took to get 2 miles away. He never looked back up at me, and never took a tug on the leash for a hint to go one way or another. I was awestruck.
Regarding putting him in with a puppy: Thunder was about 4 when we got Nikki and they were fine together. Nikki had to learn a few lessons like don't go near Thunders food dish. Thunder eats when he's hungry, Nikki will eat anything she can get her teeth into, so when she first came across Thunders full dish after emptying her own, she got a good paw shot and a guttoral growl from Thunder that set her right straight. She made the same mistake a couple of other times in the same week that I can remember and got the same response, but she learned her lesson and it was never a problem again.
He's definitely the "alpha male" and she knows it, but they rough house all the time and so far there hasn't been any blood shed, a lot of growling and a lot of teeth baring, but nothing serious or to be concerned about. Malamutes are pack animals and are happiest when other dogs and or humans are around.
OH! 1 other thing, if you're playing tug of war or have any other interaction with a Malamute where there can be a "winner", NEVER let them win. Like I said they're pack animals, and if you let them realize that they have the "upper hand", they'll never listen to you again. make sure you stay above their head level when disciplineing them or giving them commands.
I have some other pics, I'll put them up on my site and get you a link. They're too big to post here.
Sorry for the long reply, but I learned a lot about the breed in the last 5 years, there's no reason for you to reinvent the wheel