The install is extremely easy. Here are two threads you may want to read. I wired mine directly to the fuse box as mentioned, and the fog lights work with the switch just as the factory intended. They even come on for a minute or so after you shut off your car and leave it, just as the factory intended.
You DO NOT have to remove the dash switch.

https://www.crossfireforum.org/forum...l-06-base.html
https://www.crossfireforum.org/forum...-roadster.html