Petrus is an uncommon, but very interesting 3x3 method. This video teaches the last three steps.
Part 1 is here: http://www.youtube.com/watch?v=PR0332iGSZg
Winter Variation: http://www.youtube.com/watch?v=AGtclM-fH4A
EJF2L/EJLS: http://www.youtube.com/watch?v=oKQVd4M8Ecg
Lars Petrus's site: http://lar5.com/cube/
My Channel: http://www.youtube.com/noahcubes
Check out our website: http://www.cubingworld.com/
And our Facebook page: https://www.facebook.com/CubingWorld
And don't forget to subscribe!