Personally i would be more inclined to suggest a way to optimise the resources that the wall paper section uses. As a starter i would scrap anything pertaining to the old 4:3 screen res which unfortunatly would be almost the entire library. But if you did do this then you would really only need 2 major sizes to replace them with, that being 1280x720 and 1920x1080. I havent seen a 4:3 CRT or LCD monitor in almost 6 years and quite frankly doubt that the old aspect ratios are even relevent to todays average Screen ratio
well i for instance bought specifically a 4:3 lcd screen because old games wont run fullscreen on widescreen and besides i dont like widescreens in general.