Have you considered trying Paint? This is what you get: http://oi51.tinypic.com/rj39dh.jpg
Any (!) other program which can handle images can do the same: Paint.NET, Gimp, FaststoneImageViewer, XnView, jpgIlluminator, Photoshop, Photoshop Elements, IrfanView, Picasa, Inkscape, KolourPaint, ... even pic upload services like tinypic.com can automatically resize an image!
Seriously, I find this quite astonishing, as in my world, anyone who could open a browser and download and install something like "Sauerbraten" should also be able to open a .jpg file and resize it...