If I understand, you are trying to use a second disk with an already installed version of XP? This is not always successful. What happens when you turn the system on with no disk? Since one port is broken, you must be using a different port. This will often cause windows to shut down as it is not seeing the port and device it was installed to. I would do a clean install on the second disk, then after all is up and running plug the old disk in and see if I could get my files off it.