Smooth Page Transitions - Really want to learn

Hello Peeps,
Im new to Kirupa and an aspiring flash designer, and I was wondering if someone can help me out with something. Im trying to create smooth page transitions using AS3 but I cant seem to find any tutorials on it. Someone however did post up a thread like this (under the actionscripting 3.0 threads) and found a tutorial, but it is for an older version of flash. Here’s the link:

http://www.kirupa.com/developer/mx2004/transitions.htm

Basically I want to create a webpage that is smooth and flowing when you navigate through. Does anyone know how to to do this using AS3. I want to reach the level where my flash projects turn out as smooth as this.

http://www.monolab.cl/

Any help or guidance as to where i can go to achieve this would be greatly appreciated. I look forward to hearing from anyone with advice. Thanks all!!!