Every movie clip on the stage regardless of its size has a memory overhead in the player.
Solution
Only load movieclips when required and unload immediately afterwards.
Detailed explanation
Every movie clip on the stage regardless of its size has a memory overhead in the player. By reducing the number of movie clips on the stage the static memory usage can be reduced.
On hardware there is often not enough memory available for the Flashlite player to handle a large number of movie clips on the stage and this then restricts the content that can be authored.
The majority of developers do not realise that there is an overhead regardless of the content of the movie clip. A number of developers then discover that their content suffers from memory issues on target hardware as they are using a large number of movie clips.