Makerbot 2X support

I had no problem setting everything up with my Makerbot 2x. I have two problems. The first one is when I start the print the Home goes all the way to the right corner which I want it to go into the middle. The second one is I connected a Logitech webcam and it does not monitor the video. How can I add a usb camera? How can I get the print go to the center of the build bed?