You can replace the stop watch but I'll be darn if I can remember how to do it.
It may be called "Clock.dds" but I'm not too sure that is it.
The file can be found under \TigerMaru_overhaul_2\Data\Menu\skins\American\Gui I assume in the same place in FOTRS
As for the fog there is a mod for lighter fog for TMO. It can find it in the mods download section I believe.
Not all that much help
but maybe someone else has more info.
Magic