The only code the F5's have is for the Cam's menu which is normally 6666, never heard of a code to get into the Satellite setup part before and should be accessible as normal via the menu.
If your trying to upgrade Via USB what exactly are you trying to upgrade and secondly is the F5 seeing your USB stick when plugged into it
usually the manual scan screen lets you edit/add transponders
the sat has to be selected in the sat list 1st,make sure of that