600 mc's and lagging

Hey.
Like the title states I have 600 mc’s representing enemies on my stage, theres no collision detection, all thats really being done every game loop is updating the position of the enemies. The updates are done by premade dx and dy numbers which are constant.

Basically only thing thats happening is 600* x +=dx; y+=dy; before the frame is drawn.

This is lagging quite a bit.

Im using a dualcore laptop, it’s only got GMA graphics… but still, I thought it would be doing better.

Are there any tricks to making Flash handle better?