You can now get Canon’s software without using the included software provided you have the serial number of your camera.
Step 1 go to Canon’s website support page “support & drivers” (http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/eos_5d_mark_ii#DriversAndSoftware)
Step 2 input your camera model
Step 3 input camera serial number in the pop up window (make sure pop ups are enabled in your browser)
Step 4 (after download is complete) unzip file and install