I have downloaded 4.5.0.37 to my pc how do i get my blackberry upgraded?

I brought my blackberry from the US and it was an AT&T running 4.2 .I am in Israel now and they run 4.5 .I am having problems with some apps.I also dont have the right Nav software for the GPS and am wondering where I can get the Navigator software used by Cellcom in Israel (Cellcom Navigator).

If someone can tell me how to instal the new OS to my blackberry I would appreciate it.If anyone know of Cellcom Navigator I would also greatly appreciate it.