This model received some paint damages to the front nose in summer 2006 so since I had to repair them & repaint the frontnose anyway, decided to do some more changes while the model was taken apart, for instance the foglight openings. Didn't have to worry about damaging the paint while sawing & filing the foglight openings since the paint was already damaged LOL
The model originally had the lights with orange outer lamps & the lamp assembly were installed to the body simply with screws. Newer models have different foglights, I think they're glued to the openings.
The pillars between the lights in the foglight openings had to be cut with hacksaw & files.
The new lamps I made from clear CD cover plastic. Each lamp has 2 plastic pieces joined together, between them is peace of bare metal foil and the front plastic peace is textured to give it more realistic look.
As for the louvers or grilles, I actually tried to make them as I too like that look but they're so tiny parts in this scale I couldn't get them look nice and smooth enough. I don't have small enough tools to do them better so I left them out. I placed the foglights deep inside the nose so they wouldn't be so visible.
This is what the grilles I tried to make looked like, too crude in my opinion:

Here's a pic of the scratchmade foglight, looks a bit crude when inspected close up but as they are deep inside the nose it's not so visible even if they're not perfect. These are quite tiny parts too.

Here's few project shots of the foglight openings:






I think here at KRO and KRUK you can find the best custom made models I've ever seen, check out for instance the SPM thread in this page, very nicely done custom model by Josch Schultz
