[Hezzy002]

I edited my post with a way to implement it in GS2. Edit was supposed to be right after but I didn't have time, had to go off to school.

You should also rig a percentage of tweening to use as a variable, it's useful. For instance, in my implementation there's some preset types of easing, with each one being able to be modified by a scalar value. A value between -infinity and infinity. A value > 0 will make it start quickly, and end slowly. A value < 0 does the opposite, while a value of 0 will make it run at the same pace the entire time, with it all being relative to the distance from 0. Flash does the same thing. All it takes for that is a little multiplication against the value you input into the easing type function.