OEM alarm in 99 Acura TL

yeah, the best option would be to find the acura's wire to disable without unlocking.  i recently did a similar crimestopper in a new avalon where you had to access the lock, unlock, and disarm in the driver's door. i was unable to locate a disarm wire that wouldnt unlock, so i used the factory disarm wire (-) on the crimestopper and tapped into the output on my unlock/disarm relay. you want to diode isolate just to be safe. 

so, every time the car attempts to remote start, the doors briefly unlock (because of the disarm wire from the crimestopper, not pushing the unlock on the keyfob!). then i programmed the "lock during and after start" feature to lock.  there's about a 10 second window where the driver's door (driver unlock priority) will be unlocked.