Ah, had a quick look at the spec. Just use DivX as your codec, at 720x480. To do this, start VirtualDub, open your video file, set audio to "direct stream copy". Set video to "normal recompress" or "fast recompress". Set video compression to DivX, with the "Home Theater" profile selected. Then select "File", "Save as AVI". This should hopefully cover it
