This isn't going to help.
I had room for a VBox install and had PCLinuxos-KDE-2011.6, so, I installed and updated. The only thing I added was task-scanning.
I ran the installation script from my normal user account.
The installation dialog opened, then I got a prompt for the root password. The installation proceeded and when complete I could print and scan.
I don't know what to do next.
I'll add that when I got the printer, I was running 2007-KDE and the driver installed there as well, but I didn't test the scanner side.