To change the country for weather, open:
config.xml with notepad (copy it to your pc first, then look in the file for london, uk, using the same format change to what you want, ex:
(well, you get the idea), then save, copy back to location on phone restart the laucher app and that's all.
As for the changing brightness option, mine too seems stuck and I can't change the brightness. This is a very big problem, but hopefully can be fixed.
Apart from that, this is an awesome mod, love it over the original, great work. Thanks alot!