Hi, and welcome to Just Answer!
There are no provisions to disable the factory alarm system. Your options are somewhat limited.
If you let me know what direction you want to go (fob or switch) let me know and I'll be happy to help you out with instructions!
I thank you for accepting my answer!
You can pull fuse #10 under the hood, but I think you'll find it has a bad effect on other systems (interior lights / radio / etc..). As will simply unplugging the module.. It effects to many other systems.
They intentionally design the system to be problematic if unhooked.