[XNA] GuitarHero game?

Hello there,

I've tried to create a game that has the same principles as Guitar Hero (so there are notes that fall down and you have to press the correct keys as they drop). I have included a link to the source code of my game; now I shall list the problems that follow with the version that I have created:

1. Have to add notes through the form as I cannot get it to create instances from the XMLParser
2. I have to create a new Texture2D and a Vector2 for every note that I add

Could anybody please help? Just general idea's would be a big help! (I tried to create arrays for Texture2D[] and Vector2[] however, I couldn't manipulate them, they wouldn't move).

Thanks!