change horn lock settings

I have a 07 Mustang, put in a python 990 alarm, r/s. I hooked up horn honk along with 2 sirens. Is there a way to set it up so when I hit lock and unlock it honks the horn instead of the weeny sounding sirens, like it used to with the factory keyless entry. I lost the program book, so if someone can help me out, I'd appreciate it. Python is the same as a Viper alarm.

as far as i know u can only do the opposite of what your wanting to do....