Hardware Secrets has posted a guide about connecting two PCs using an USB-USB Cable
A very easy way to connect two PCs is using an USB-USB cable. Connecting two PCs with a cable like this you can transfer files from one PC to another, and even build a small network and share your Internet connection with a second PC. In this tutorial we will explain you how to connect two PCs using a cable like this.Connecting Two PCs Using an USB-USB Cable