Accessing to an object in a later frames...

[Plusz]

How could I access to an object, which exist only - for example - in 5 frame, and don't exist from the beginning of MovieClip? If I want to set a textField (from a callback, outside scaleform) in such object - could I do it from main object script (creating callback as usual, and so)... and how?

Object exist in many later frames of a MovieClip, but has tween etc. Do we have some simple way to set this textField in this object? And how?

Situation looks like this:

FirstObject (Main) contains SecondObject and in 5 frame of SecondObject we have ThirdObject which is animated, and have textField.