Learn 2 Play Guitar 5-Pack (PC)

I got this wih the intention of improving my range of guitar playing. I wanted to play a little more blues, funk and indie as well as the metal/punk/grunge that i usually play. It has 5 dvds and each have a couple songs for you to learn. I decided to check out some rock and played the first song easily as it only had 3 chords and was pretty slow. Then i tried to play what i think was "smells like teen spirit" by Nirvana. It played a bad cover version whilst deciding not to show me any chords or notes. I then tried other songs which wouldn't show me any music notes. The whole thing doesn't seem to work and it all is just a waste of cash. I would reccomend ...