First of all, how many do you plan to use? Then you need to decide what voltage you want to power them from. Each one needs 2.2V, but the total voltage you will need to provide to them depends on whether you wire them in parallel, series, or a combination of the two.
This page http://led.linear1.org/led.wiz
is what I use to design my led layouts.
Let us know more about how you want to hook them up, and we can provide more specific information.