If the machine is still under warranty, there is a service agreement on the account, or you are certified to work on Phaser products, it's a free call. Otherwise, no it isn't.
The experts that you'll need to talk to are at 1.800.835.6100. If you get stuck replacing the sensor then just give them a call and explain what you are trying to do and how far along you are in the process of changing out your sensor.
It looks like you found the instructions!
I do not know of any easier way to replace your sensor, no. I'm glad that you were able to find this information. Good luck and let us know if you get it running again.