Default HDMI mirroring on atrix / gingerblur / 2.2.2 question / 1080p avi's

When I redirected my the output last night to my Sony Bravia, the dimensions on the screen were very thin/vertical, sort of like the phone. Is there any way to make it conform to true full screen / 1080p resolution? or is that just not possible?

What about if I have a high quality movie playing, ie: 1080p divx avi on the phone, and i want to mirror the output to the tv, to take advantage of the full screen 1080p bravia, and not that small smegment everything is chopped down to?

is any of this possible?