in reply to Re^5: Cannot find SDL library with PPM
in thread Cannot find SDL library with PPM

Uninstall PPM-Sisyphusion, or use --force to allow files to be overwritten

Either way should work.
PPM won't overwrite a file of the same name - even if it's identical (as will always be the case with my ppm installations).
It looks like Class-Inspector is going to install its own files plus the ones that PPM-Sisyphusion did, so I'd probably run:
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
I'll be off-line now for a few hours - but I'll pick up again in the morning when I wake up.
Hopefully it'll be plain sailing from here, anyway.

Cheers,
Rob