I think I'll try to link to the various Path Finder threads in this one, but I'll make up my mind when I have the time to fool with it.
In the meantime this macro shows:
How to get the Path Finder selection as a list of POSIX Paths via AppleScript.
How to get that list into a Keyboard Maestro variable from AppleScript.
How to get a Keyboard Maestro variable into AppleScript.
How to use the selected items path list to copy the items to a destination directory.