Re: FORD FIESTA MK6 Lowered Suspension
Lowering your car shouldn't pose too much of a problem. It usually comes down to the internal space (height and width) of your wheel well. Lowering and keeping the travel (distance the wheel moves up and down) of the suspension soft may result in some "bottoming out". Adding stiffer springs often reduces the travel and consequently the "bottoming out" effect.
Adding wider wheels may be more of a problem. Probs often occur when turning hard or at full-lock, as the wider wheel and lower height often result in the tyre scraping the inside guard and liner.
I don't know the Fiesta specs at all so is hard for me to advise, other than go to a reputable wheel / tyre / suspension mob and get some advice after they look at the car. More often than not it is a case of trial and error. I'm sure it has been done many times so hopefully someone who has done it before posts a reply.
Front foggies should be easy. I assume the space is there to mount them. You'll just have to wire then into the lighting circuit and add the appropriate dash mounted switch. Have a look at some posts in the electrical forum for more info.