Try searcing the metal section on the main page. There is a lot of good excersices out there. Try out some legato exersises, they are mostly easy becouse they don´t recuire too much picking. And get used to use the pinky - everything gets very much easier when you get used to it. And one more thing: get youreself a metronome!!

By the way, check out my trick. It´s not easy, but when practised with metronome, you will soon arciewe great accuracy AND speed.

http://www.guitartricks.com/2000/trick.php?trick_id=4445

And ONE more thing: Self disipline. Newer give up and start over again if you make a failoure. Make sure you play youre excersice perfect before you increase in speed. Vai used to say that. ;)

Hope that helps a little. =)