I had read that CCleaner could uninstall and clean up after Spyware Doctor. However, it appears that is not so. Apparently, a very special process is needed to clean Spyware Doctor from a computer. I would love to see that added to CCleaner.
Im not sure that you'll ever see 'application specific' support for an uninstall. CC runs the uninstaller thats provided by the application. Otherwise CC cleans known temp/junk files and orphaned registry entries. PC Tools does provide removers for various products they publish via their forum.