Firstly I note recent posting on this subject
http://www.pclinuxos.com/forum/index.php/topic,110439.0.htm in which
kde4-noblank is mentioned.
As I have the same problem i.e. un-ticking the power saving options in the Energy Saving - System Settings wizard does not work, I checked to see if
kde4-noblank was installed, which it was. I note on the wizard an option to Run Script on Profile Load. Does
kde4-noblank have be to run to be effective?
Please note I'm new to Linux so don't quite grasp its inner workings

As an aside, can anyone tell me how to auto-run programs at startup?
Thanks