So I've just finished the long, boring starship level and then done the dive sequence when you crash the big triangle cruiser into Kamino. I jump down, deal with all the walkers and the rocket robots and the stormtroopers and I'm just left with the big guns and the door to open. 
 
I press RT to Force Grip the big door, and then tap A a bunch of times but no matter what the guns shoot me and interupt me. I've tried throwing things at the guns but it doesn't kill them and I can't hit them with force lightning, and I certainly can't open the door, so what the fuck am I supposed to do? Games rarely make me angry but I ended up punching something after spending 20 minutes trying to figure this shit out.

Well, if you look up you should see a broken window next to each gun. You may want to get up there.

I finished this level last night so I might not have this exactly right, but I'm pretty sure this is what I did.  Climb up the big pile of debris in the middle of the area. From there you should be able to jump into a hallway through some broken windows. From inside there you can take out a gun. There's another spot identical to this on the other side of the room where you can take out the other gun. 

U have to walk around and hold down the grip button and hope to yank the guns out. Anotehr question after vader is done throwing glass at you he just stands there on his platform how the F*** DO I GET THERE!!!!!!!!!!! I'm really angry right now if u cant tell