...and how should one move them. There's no special key to do so and moving the entire aircraft to keep the bomb locked onto the target until impact would not sound ridiculous, it's also not making sense since you need to a TV display for that, which you actually shouldn't need to drop LGBs on the primary target. 
  
Bottom line is...I'm confused about how this is supposed to work now. The previous guidance method (btw, how did it work in WOI before the Aug 2008 patch?) was fine and well in tune with the 'sim lite' approach, but now it's almost useless.   
  
(Don't read this as an "OMGWFTBBQ! Teh game'S broken!!!!111!!" rant, though. I just want input from those that might know more about it.)