My thanks and apologies to everyone who responded. I now have both analog and USB sound working in PCLinuxOS 2010 Beta2. It's pretty cool actually, as it allows me to send different audio to different speakers. For instance, I'm sending music to the USB speakers, but video sound to the analog speakers. (At least for now, I'm just playing with things at this point.)
Apologies are due because it took so long to resolve this due to operator error.
I have several different distros and versions installed on a test machine, as well as my trusty old KDE 3.5.10 main machine. On the test machine I got confused about which version I was working with and couldn't follow the suggestions given in this thread. After a very nice Easter dinner and a little nap I tried again and got everything working OK.
Basically I followed the suggestions of lsword and jif001 and they worked fine in PCLOS 2010 Beta2.
No joy with v2009, same as jif001.
Thanks again for the help!