Immobilizer help!!!!!

I have someone break into my car 2005 Nissan Altima messenger cylinder broke the antenna around the key hole. I didn't even know about this immobilizer until the break in. I need to bypass the immobilizer. I am the owner of the car and my boss gave me two more days to be off to fix this if I can't I don't have a job. I don't have any money for the dealership or a lock Smith. Some one please tell me how to by pass this until I can get it fix.