Yes, /etc/apt/sources.list contained in the current ISO (2013.02) is working just fine. Or at least it is for me
Thank you so much for confirming all this.
My brother is stopping by tonight with his notebook computer and his new printer. I'm going to do a reinstall of PCLinuxOS and then hook up his printer. Should be easy to get his printer up and running now that I know hplip is the latest and greatest and supports the P3520.
The bump in the road was I didn't update is system since first installing. He was always using it and getting work done. I warned him that I'll probably need to do a complete reinstall down the road. No problem. He LOVES running Linux and not having to deal with all the Windows problems.