How'd that work out for you?
Worked well until I pulled up to the checkpoint doing it. Thought they were going to take me to secondary...

Ken,
Here is code using DT's INTs giving an interrupt at 200 Hz.
All I did was tweak Darrel's blinky example.
Code:
<font color="#008000"><b><i>'FL PIC16F887
'16F887 DT INT RUPT
'44 PIN DEMO BOARD

'REMOVE THIS LINE IF NOT SETTING THE CONFIGS IN CODE SPACE
</i></b>@ __config _CONFIG1, _INTRC_OSC_NOCLKOUT &amp; _WDT_ON &amp; _MCLRE_OFF &amp; _LVP_OFF &amp; _CP_OFF
</font><font color="#0000FF"><b>OSCCON </b></font>= <font color="#800000"><b>%01100000 </b></font><font color="#008000"><b><i>'4 Mhz
</i></b></font><font color="#FF0000"><b>DEFINE </b></font><font color="#0000FF"><b>OSC </b></font><font color="#800000"><b>4

</b></font><font color="#0000FF"><b>LED1    </b></font><font color="#FF0000"><b>VAR </b></font><font color="#0000FF"><b>PORTD</b></font>.<font color="#800000"><b>4
</b></font><font color="#0000FF"><b>wsave </b></font><font color="#FF0000"><b>VAR BYTE </b></font><font color="#800000"><b>$70 </b></font><font color="#0000FF"><b>SYSTEM
</b></font><font color="#FF0000"><b>INCLUDE </b></font><b><i>&quot;DT_INTS-14.bas&quot;     </i></b><font color="#008000"><b><i>' Base Interrupt System
</i></b></font><font color="#FF0000"><b>INCLUDE </b></font><b><i>&quot;ReEnterPBP.bas&quot;     </i></b><font color="#008000"><b><i>' Include if using PBP interrupts

</i></b></font><font color="#FF0000"><b>ASM
</b></font><font color="#008000">INT_LIST  macro    <b><i>; IntSource,        Label,  Type, ResetFlag?
        </i></b>INT_Handler   TMR1_INT,  _ToggleLED1,   PBP,  yes
    endm
    INT_CREATE               <b><i>; Creates the interrupt processor
</i></b></font><font color="#FF0000"><b>ENDASM
</b></font><font color="#008000"><b><i>'5.0 mSec OR 200 Hz INTERRUPTS
</i></b></font><font color="#0000FF"><b>T1CON </b></font>= <font color="#800000"><b>%00000001         </b></font><font color="#008000"><b><i>'Prescaler = 1:1, TMR1ON
'PRELOAD 60543
</i></b></font><font color="#0000FF"><b>PreLoad     </b></font><font color="#FF0000"><b>VAR WORD
</b></font><font color="#0000FF"><b>PreLoad </b></font>=  <font color="#800000"><b>60543
</b></font><font color="#0000FF"><b>TMR1L </b></font>= <font color="#0000FF"><b>PreLoad</b></font>.<font color="#0000FF"><b>LowByte
TMR1H </b></font>= <font color="#0000FF"><b>PreLoad</b></font>.<font color="#0000FF"><b>HighByte
</b></font><font color="#008000">@ INT_ENABLE  TMR1_INT     <b><i>; enable Timer 1 interrupts

</i></b></font><font color="#0000FF"><b>Main</b></font>:      <font color="#008000"><b><i>'DO WHATEVER YOU WANT HERE
  </i></b></font><font color="#FF0000"><b>PAUSE </b></font><font color="#800000"><b>1000
  </b></font><font color="#FF0000"><b>HIGH </b></font><font color="#0000FF"><b>PORTD</b></font>.<font color="#800000"><b>7
  </b></font><font color="#FF0000"><b>PAUSE </b></font><font color="#800000"><b>1000
  </b></font><font color="#FF0000"><b>LOW </b></font><font color="#0000FF"><b>PORTD</b></font>.<font color="#800000"><b>7
</b></font><font color="#FF0000"><b>GOTO </b></font><font color="#0000FF"><b>Main

</b></font><font color="#008000"><b><i>'---[TMR1 - interrupt handler]--------------------------------------------------
</i></b></font><font color="#0000FF"><b>ToggleLED1</b></font>:
     <font color="#FF0000"><b>TOGGLE </b></font><font color="#0000FF"><b>LED1
     </b></font><font color="#FF0000"><b>TOGGLE </b></font><font color="#0000FF"><b>PORTC</b></font>.<font color="#800000"><b>6    </b></font><font color="#008000"><b><i>'CONNECTED TO METER
     </i></b></font><font color="#0000FF"><b>TMR1L </b></font>= <font color="#0000FF"><b>PreLoad</b></font>.<font color="#0000FF"><b>LowByte   </b></font><font color="#008000"><b><i>' Load the timer with preload value.
     </i></b></font><font color="#0000FF"><b>TMR1H </b></font>= <font color="#0000FF"><b>PreLoad</b></font>.<font color="#0000FF"><b>HighByte
</b></font><font color="#008000">@ INT_RETURN
</font>