Hey man, nice sprocket!

Sure, if you notice there are three types of joints, one with the notch extending in one direction and the other has the notch extending on both sides and the last one doesnt have a notch at all. If we denote the joint with no notch | and the single sided notch -| and the one with the double notch is -|-, a set for a track would look like this
-|,-|,-|-
|-,|-,|-,|

Repeat this and you have a even track 7 units wide, you can add pieces to the middle to make the track wider but you would have to increase the length of the pins.
I just press the pins through the hole and used the included cylinder to hold them on, it just fits on to the end of the pin and is dimensioned to be a tight fit. If you look at the included pictures and click on the right arrow the second to last picture shows an above view of the track that is clearer.

Hi could you provide some assembly instructions? Like which parts for each link. Looks like they alternate between 4 to 3 parts per section but I cant tell which parts from the picture.

this is nice im thinking conveyer belt

:-D

This is the track I put together to use on my ground up build of a wall-e ish robot using a EZ-B robot kit.