Multiple switches in circuit, but one needs to be a 2 way
Unusual problem here..
I have regular ceiling lights, wired with two 3-way switches.
My garage door opener (Craftsman) has a add on that would allow me to use my remote to turn on or off a lamp inside the home (outlet that switches on and off with the remote, basically a 2-way switch, either hot or off circuit) Seen here
Here's where I get stumped. I want to use this for our ceiling lights, and maintain the current switches that are in use. I just can't envision any arrangement in which this would work. I've never worked with relays and such, but would there be some sort of electrically controlled 4-way switch that I could use? Say a switch that would work in my existing setup but can be switched with the presence of a different source (the remote light control)?
Any ideas would be helpful. Thanks!