Using x2 size (retina) assets in flash builds

Hey Everyone!
I'm extremely sorry if this was asked before (search does not produce good results).

Question is:
- Can we somehow 'hack in' or 'turn on' x2 scale assets (retina) for flash builds? This way we can judge how the game will look on retina, while playing in flash.
- If it's impossible (which is my guess), is it planned for Stencyl 3.0? (along with support of x4 assets for ipad3)