Besides, your TV would have to support such an exotic resolution in the first place. And i don't think TV's supports 544p resolution
Well I was thinking along the lines of the PSP method. Of outputting 480 x 272 within 720 x 480 with black boarders around the sides.
But in this case. 960 x 544 within 1280 x 720 and again with the black boarders around the sides. Is that doable with a hacked PSTV?