i am using the 320x240. it wont allow me to put the 640x480 on the remote. i had this setup on my philips pronto 9400 and could resize it and make it full screen. it was a little bit blurry but not much at all but when doing this on the t3-v if i try to make it even a pixel bigger it gets all distorted and cannot make out the image. on the traing video for rti the guy says just drag and make the image bigger and the remote will fill the screen.