ppm uninstall http://www.sisyphusion.tk/ppm/PPM-Sisyphusion.ppd
and then the other commands:
ppm install http://www.sisyphusion.tk/ppm/Class-Inspector.ppd
ppm install http://www.sisyphusion.tk/ppm/Capture-Tiny.ppd
ppm install http://www.sisyphusion.tk/ppm/File-ShareDir.ppd
ppm install http://www.sisyphusion.tk/ppm/Alien-SDL.ppd
ppm install http://www.sisyphusion.tk/ppm/SDL.ppd