Controlling duplicates

http://www.ikickedmydogintheface.bravehost.com/smashtv3d.html

hey everyone I am going to ask this question again…maybe you guys could help? I seem to be having a problem with the depth here, and Ive tried a few things such as:
[“teletubby”+i].depth=[“teletubby”+i]._xscale*[“teletubby”+i]._yscale/2;
thinking that this line of code would automatically assign the highest depth to the biggest teletubby (meaning that the smallest guys stay in the back and everything doesnt look all wierd). this didnt work. I then tried some other things but they proved counterproductive does anybody have ANY idea about what to do?
also is there any particular way in which to control individual duplicates of movie clips when there is a function that infinitely duplicates movieclips? can anybody help? thanks in advance.