First - I think you're on track for 'training' your white muscle fibers. Plyometrics, explosive movements, etc are the only way I rememeber being able to develop (or recruit) white twitch muscle fibers.
But I always thought - like Wanole - that genetics dictated our own personal ability to an extent. I was under the impression that we had equal amounts of white twitch/red twitch, but that some had more developed types of these fibers then others.
The article is interesting - I did a quick search and didnt find alot, but did find some references. Interesting stuff!!!