I need help wiring a switch. I have a light switch in the foyer which I'd like to replace with a Decora light switch. The existing switch is tied in with 2 other switches, one downstairs and one upstairs. You can flip any of the 3 switches and the foyer lights will go on or off. There are [B]4 terminals + ground[/B] on the existing switch: [LIST] [*]The top 2 terminals have a red wire going to the left terminal, and a red wire going to the right terminal. [*]The bottom 2 terminals have a black wire going to the left terminal, and a black wire going to the right terminal. [*]The underside terminal (ground) has a bare copper wire going to a wirenut tying it to the ground wires coming from both romex ends. [*]The white wires coming from the romex are wire-tied together. [/LIST] I want to replace the switch with this new Decora switch, but the Decora only has [B]3 terminals + ground[/B]. How do I wire this?

Let me start out by saying that I have done very little electrical work myself. I am going to install a TV on the wall of our screen porch and to save some money I am going to try to do all the wiring myself. I will be getting power from an electrical outlet in our bonus room and bring the wires down from the ceiling. My question is, do I need to get an outlet that has a GFI (?) switch on it or will just a regular outlet work? Also, any other tips to help make this job go smoothly would be very much appreciated. Thanks!