[shorod]

Doesn't the window regulator come with a new motor?

To get the motor loose without having the cable spool come apart, you could try inserting a putty knife between the motor and the spool housing, then keep pressure applied to the spool side. Once the motor is loose from the spool, you should be able to stop applying pressure. You might even be able to install a cable tie somewhere to hold the spool in place while looking at the motor.

-Rod