DEI 508D Field Disturbance Sensor Problem

I've got a Ultrastart 4560M alarm with remote start on my Jeep Wrangler. I decided to add a field disturbance sensor since the top is staying off during the summer. I purchased a DEI 508D from one of our distributors and put it in today. The problem is that the pre-warn first stage output of the sensor is 500ms which is too long of an output for the Ultrastart alarm. It causes the alarm to go off instead of pre-warn chirp. The alarm needs a 250ms pre warn input. Is there any way to adjust the output duration of the sensor?

That would work if the 2 stage shock sensor wasn't built in to the brain. If it plugged in, I could try tapping onto the pre-warn wire on it. I am going to try a different brand of sensor. I tried to get DEI Tech help to see if they have any suggestions, but they will only provide technical assistance to authorized reatilers of their product.

That would work if the 2 stage shock sensor wasn't built in to the brain. If it plugged in, I could try tapping onto the pre-warn wire on it. I am going to try a different brand of sensor. I tried to get DEI Tech help to see if they have any suggestions, but they will only provide technical assistance to authorized reatilers of their product.

Anybody?