I am on WIndows 7, using a DELL Latitude, I have the same concern as the user who posted this question.
I would like to set 1280x720 as my resolution, this is because I would like to record full screen video tutorials tu put on YOuTUbe wihtout stretching the recordings (thing I am currently doing).
I don't see 1280x720 as a supported mode.
I also tried the registry trick Display1_DownScalingSupported described in the linked quesion (the last answer speaks of that), but with no result.
Can you help me?