Thanks for the guide, used it this morning to adjust the switch as it kept setting of the VSA light each time I touched the brakes, and I had no brake lights! - Lights are working and no more VSA light, but I've broken the cruise control! (New switch is on the way!)
As for your new rumble, there's a chance driving with the brakes fully on could damage the gearbox/clutch/drive shafts and possibly fly wheel as they are working a lot harder than designed, but I guess it depends on how long they were being pushed that hard.