Carpet squares in the game room

I picked up a bunch of carpet squares for cheap from CL today, here: http://sfbay.craigslist.org/sby/mat/3407198750.html

I figure I can carpet the whole game room with this stuff for less than the price of a good meal out with my wife. Plus, since they are 3 foot squares I won't be required to move the games all out to unroll a big unwieldy carpet. I can just move the games over, put the squares down, and then move games back on top of them as I go.

Anyone have any tips for installing these things? I've never done it before.