Where are you from buddy:
It was -10F windchill here yesterday and my windows froze.....damn irritating when you ahve to order something from a drive thru....
Anways there is no way out of that other than have a heated garage and since I spent all my cash on the bimmer....I have no way to do that :P .
Anyways dont try pouring hot water on the windows as some dunk heads mught suggest or heat it with a Hair dryer........
. Since you mention the one window you changed the actuator on comes down and the others dont...kinda rings a bell in my head ......did the dealr screw up something while installing the actuator?????.....you might wanna take it back to them and check it out. Or else wait for a warm day and try rolling the windows down.
Regarding the whistling from the blower I get that sound for a few seconds (I have auto climate control) in teh beginning when its friggin cold out but it stops once the car warms up...I would not be too worried about it.
Ciao hope everything works out.