If you're using HPWM you don't need to mess with Timer2. It's automatically handled
for you.

If you plan to setup hardware PWM manually, these calcs should help.
Code:
PR2=(Fosc/(4*PS*Freq))-1
TMR2 Prescaler = 1 PR2 = (8MHz/(4*1*12,000)) = (8MHz/48,000)-1 PR2 = 165.666
TMR2 Prescaler = 4 PR2 = (8MHz/(4*4*12,000)) = (8MHz/192,000)-1 PR2 = 40.666
TMR2 Prescaler = 16 PR2 = (8MHz/(4*16*12,000))-1 = (8MHz/768,000))-1 PR2 = 9.416

CCPR1L:CCP1CON<5:4>=(PR2+1)*4*Duty%
(165+1)*4*0.5 = 332
(40+1)*4*0.5 = 82
(9+1)*4*0.5 = 20

To load the duty cycle registers just place the value calculated in a word, and
do something like this;

Duty = 332              ' Roughly 50% duty cycle
CCP1CON.4 = Duty.0	' Setup 10-bit duty cycle as
CCP1CON.5 = Duty.1	' a 10-bit word
CCPR1L = Duty >> 2
Search here for HPWM and you'll find a boat-load more examples.