Why would you want to?Not sure if everyone knows this but you can buy a factory remote start from the dealer to replace the basic key phob you get with the new car. Here in Canada (not sure about the US) you get the standard phob.
On the honda.ca when you build an EX-T it shows the phob as an accessory for $95.09.
Notice how this phob is 2-way according to the pic attached.