PIDUSB 12 works only for UC to PC communication. It implements a USB 1.1 device.
To get it upp and running you need to write the USB devicr drivr for your UC and find/write a driver for the PC. Beond logic is a great source for that.
USB can not be used for UC to UC communication without a lot of coding. The USB device driver is easy to create but to comunicate with a device there must be a USB host on the buss (in most cases the PC). For this you need a USB host chip and a driver for it, and this driver is not an easy pice of code...
To lear more about USB also check the www.usb.org 's developers forum.