Tried screaming for the first time, any tips on how to improve?

This is the same song I posted on the mix template thread, but I threw in some vocals and I'd be grateful if the screamers on the board could give some tips exclusively on how to improve my voice.

It's the first time I've seriously attempted screaming (which is pretty obvious since the vocals sound like utter shit :D), but I'd really like to learn how to do a proper 'fry' voice as it's defined in the Melissa Cross DVD's.

Here's the link: http://www.selmary.com/Scream test3.mp3

Even though the end result is nowhere near what I consider good, the positive thing is I didn't hurt my throat or start feeling dizzy or light-headed while doing this, which has always happened before. Guess I've learned even something :)