We recently had Pergo flooring installed in our spare bedroom by a professional. He used a series of strap/clamps to get the tightest possible mating of the pieces together. After watching him install the floor I'd be willing to try it myself (without the clamps) using a small piece of scrap wood and a rubber mallet. While watching the installer he informed me that the most important thing in installing the floors was to offset the boards to avoid any appearance of seams.

If you live near a Home Depot store they have weekly classes that will show you how to install these yourself.

we are getting ready to install pergo flooring in our kitchen. the home center sells a video for $10.00 that i would reccomend purchasing. good luck