CCP2 and external interrupt

[GagoX]

Dear people, my problem is the following,

I am programing the 18F442 pic with the compiler from CCS (PIC-C).
I need to use the PWM module (CCP2) to drive a motor from pin B3.
I have to use this pin because the hardware is already designed.
ok, after a lot of efford in order to use the ccp2 in pin B3 as PWM,
(because the compiler doesn�t set properly the TRISB register, so one has to do it manually)
i have a big problem.
I also need to get the position of the motor with an encoder (channel A,B and index) that is connected to the pins (B0,B1 and B2). Normaly I would use the int_ext to get the signal, but because I am using the pwm in pin B3 as soon as I enable the external interrupt my program stops working...and of course...I understand the reason....every pulse from the pwm in RB3 provokes an interrupt.
So the question, is can I disable the pin B3 from the PWM si it doesn�t call an external interrupt while I am using it?, but of course I want the other pins from port B to call the interrupt.
I have heard it is possible but I am running out of time with this project...is it possible????
Does anyone knows.???
Or if it is not possible...what can I do?...the only thig is that I cannot change the hardware configuration.

[PCM programmer]