Hello Lior,
You can get started right away. KUKA|prc generates a *.src file which you just have to copy onto the robot directory (R1/Program) and then select from the menu (take care to use "select" and not "open"). In order to see the USB drive, change the user group (Start-Up/Configuration/User-Group) to Expert, the default password is a robot manufacturer with four letters, starting with k.
In order to be able to move the robot, you will either have to connect the relevant safety equipment to the X11 plug, or directly connect the channels if you don't plan on using external safety. Alternatively go into the highest user group (same password) and enable the Start-Up Mode in the menu. You will only be able to move the robot in T1 mode, i.e. at reduced speed and constant pressing of the button on the back of the controller, in start-up mode.
There are quite a few things relating to the basic handling of a robot (e.g. pressing the button on the back of the controller to the first position in order to be able to move the robot) that are best explained on-site, so I would recommend getting someone with basic robot knowledge when you first boot up your robot. Also refer to that post regarding the tool and base calibration:
http://forum.robotsinarchitecture.org/index.php/topic,115.0.htmlIf you don't have them yet I can send you the standard user manuals as preparation!
Best,
Johannes