continued...
the other option, and probably a wiser one, would be to give passwordless sudo permissions not to sysctl, but to the shell scripts, which i would believe work because their daughter processes should still be given root privileges. (correct me if I'm wrong, please). I placed these scripts in /usr/bin, but place them anywhere in your path and chmod +x. Then in KDE4,
1) Click KMenu
2) Settings
3) System Settings
4) Input Actions
5) Select "Preset Actions"
6) Click "Edit" -> "New" -> "Global Shortcut" -> "Command/URL"
7) Under Trigger select your keymap
8) Under Action enter the path to your script and configure sudo.
Sorry if this was annoyingly redundant, I always like to make dummies like how-to's... certainly not doing it to insult anyones knowledge..