Version 3 IRLP boards are supplied with three N/O MOSFET switches capable of sinking about 2 amps. The following script, when placed in the /home/irlp/custom/custom_decode file, will allow ON/OFF control of these AUX switches. Again, these are only found on version 3 boards.
# The following code is a sample of turning ON and
OFF AUX1 contacts
See the Custom Decode help file located here