Q: Is there a way to load a .swf file with ColorPickerV3 into a blank movie on the stage, without the color picker loosing it's functionality ?

A: The AS2 version ColorPickerV3 component uses Macromedia V2 components. This is why you should use the DepthManager class when placing new movie clips on the stage and not the getNextHighestDepth() method. You also need to have the ColorPicker component in the Library of the loader clip.

In this particular case, you can place the loader movie clip on the stage during design time and just call loadMovie in run time and every thing will work. Or you could create the loader clip using code and place it on a depth you know for sure it's empty or use DepthManager to place it on an empty depth.
Files: CPicker_loadMovie.zip