Okay, I guess I figured it all out. So right now I have the following setup:
1 Arduino Board with Wireless Proto Shield (switch in Micro position) and XBee hooked up via DC jack pin, sends data to serial with Serial.print(variable) where variable is a predefined char array.
1 Arduino with Wireless Proto Shield (switch in Micro position) and XBee is hooked to the PC via USB and with Serial.read() I'm able to read data via the Serial Monitor. No configuration required whatsoever, the only thing you need to do this is to declare Serial.begin(9600) to both boards.
So it's true that I can't use Arduino and XBee at the same time, but this still works for me to solve the problem I had.
