I've always used the largest sized Vari-Kennel . The current model I am using is 40"x26"x30". I've never found the need to divide it, but I don't see why it can't be done either. It definitely saves buying two kennels.
Crate training is fairly simple,and most puppies get with the program fairly quickly. Expect the puppy to go to the bathroom in it for a little while, and just plan on having to clean it up. I used brown wrapping paper, instead of newspaper due to the chemicals in newspaper for the bottom layer,and set a pad about half the size of the crate on top of the paper. Don't use your old clothes to line the crate, or stuff the pad. It will just confuse your puppy later when you have break it of the habit of chewing your clothes. It's easier if they never get started in the first place.

Same with turning socks into an impromptu ball.
Puppies do 4 things. Eat,Sleep,Play and go to the bathroom. If it's not doing one of first 3, it's looking for a place to do the 4th item. Each time pup wakes up in the kennel, hurry her out the door to go to the bathroom. Lots of encouragement and praise. make it fun, make a huge fuss over her when she's "Doing her stuff". She'll catch on in no time at all.
Don't expect her to be able to hold it for a full workday alone. It's an unrealistic expectation. She'll get there soon enough, but her system just isn't strong enough yet, so don't get firm or rough with her if after a full workday she goes to the bathroom in her kennel.
The first couple of nites she'll probably cry, howl and throw a fit because she's alone,and has no litter mates for comfort. Soothe her through the kennel door, opening it if necessary, but don't let her out. Put a sheet over the door to help quiet her if that works. I've also heard that a liter bottle full of warm water wrapped in a towel helps calm them down, but I've never done it
Dogs actually take to the crate pretty well. Pretty soon you'll be looking for missing odds and ends in the kennel ;D,
