Let's Make Robots!

voltage doubler

3.7v to 5-6v?

I would like to add this battery to my project:

http://www.sparkfun.com/products/9876

 

However I am using 6v motors (would run fine on 5v for my application) how would I go about stepping up my voltage? I've looked at some voltage doubling circuits but to be quite honest I'm a bit lost. Any help is much appreciated, thanks!