automatix2 is for Ubuntu, attempting to run it on PClinuxOS will most likely screw your system up.
You could try the rpm from
http://www.frostwire.com/ , but most likely you will need to compile it from source. You could also post in the PCLinuxOS forum and ask Texstar to update it.
PCLinuxOS New User Guide: How to Add Synaptic Repositories
http://www.pclinuxonline.com/wiki/SynapticRepositories
Will probably help you get more sources for Synaptic.
The best place for you to ask for help with PCLOS is the official
PCLinuxOS forum.