It's not that excessive... all you need to do is crop it... and resize it vertically before
I have to say that I don't really know what can you use it for... It can give you some extra detail in very small screens, like phones and portable consoles (wallpapers, images with a fixed size). The the difference between this and a normal resize isn't that big, so you should save the files in a lossless format (.png).
I may update the plugin to crop after resizing, or maybe someone could do it for me (the code is in the zip)