for big items you can pick up and move to get over or behind.
if you're still stuck then state exactly where you are and what you're doing and i'm sure someone will be able to give you better help.
personally, i like having level 4 capture.
i hack things just because i can.
thats certainly what makes this game so cool. you can proceed however you want and the game rewards you for it.
you don't need hacking to proceed in the game. explore more. 