#define PERIOD_CYCLE	20000 // 20 ms
#define DUTY_CYCLE	1500  // 1,5 ms

void InterruptHandler(void) interrupt 0 {

	// Disable global interrupts
	GIE = 0;

	if (CCP1IF == 1) { // Interrupt on comparator module

		// Clear the interrupt bit
		CCP1IF = 0;
		
		// Reset Timer 1 values
		//TMR1H = 0; 
		//TMR1L = 0; 
		
		/*
		 * + CCP1M3:CCP1M0: CCPx Mode Select bits
		 * 
		 * 1000 = Compare mode, set output on match (CCP1IF bit is set)
		 * 1001 = Compare mode, clear output on match (CCP1IF bit is set)
		 */

		// It's set to go HIGH on CCPR1 and TMR1 match
		if (CCP1M0 == 0) {
			// We are on the duty cycle, the output on RB3 will go HIGH
			// Change the setting to interrupt on LOW next time
			CCP1M0 = 1;

			// Setup next values for duty cycle
			CCPR1H = (DUTY_CYCLE / 256); // Clear the lower part
			CCPR1L = (DUTY_CYCLE % 256); // Clear the higher part
		}

		// It's set to go LOW on CCPR1 and TMR1 match 
		else {
			// We are on the period cycle, the output on RB3 will go LOW
			// Change the setting to interrupt on HIGH next time
			CCP1M0 = 0;

			// Setup next values for period cycle
			CCPR1H = ((PERIOD_CYCLE - DUTY_CYCLE) / 256);
			CCPR1L = ((PERIOD_CYCLE - DUTY_CYCLE) % 256);
		}
	}

	// Enable global interrupts
	//GIE = 1; // Not necessary since SDCC does that automatically
}

void init_servo(void) {

	/*
	 * Duty cycles on Futaba servos (Controls the position)
	 *   1ms : 0 degrees
	 *   1.5ms : 45 degrees
	 *   2.0ms : 90 degrees
	 *
	 * Period on Futaba servos (Controls the rotation speed)
	 *   10ms - 20ms
	 */

	// Stop Timer 1
	TMR1ON = 0;
	
	// Set PWM port (RB03) as an output
	TRISB3 = 0;

	// Reset Timer 1 values
	TMR1H = 0; 
	TMR1L = 0; 

	/* 
	 * 1000 = Compare mode, set output on match
	 * 1001 = Compare mode, clear output on match
	 */ 
	// Enable compare mode on CCP1CON register
	CCP1CON = 9;

	// Clean the interrupt register
	PIR1 = 0;
	
	// Enable Peripheral module interrupt
	PEIE = 1;

	// Enable CCP module interrupt
	CCP1IE = 1;
	
	// Enable Global Interrupt Enable bit
	GIE = 1;

	// Reset Comparator values
	// This will trigger the interrupt right away
	CCPR1H = 0;
	CCPR1L = 0;
	
	// Start Timer 1
	TMR1ON = 1;
	
}

Mike, K8LH's -> CCPR1H += ((Pulse*5/2)/256)
Mine -> CCPR1H = (DUTY_CYCLE / 256);