Super Soaker Central

My friends sc 600 was broken so i brought it home to fix. I found that there is a problem
with the trigger. I got a crack open, reached in with a flat head and pulled the valve to get it to release pressure. As i puled the trigger while looking in the crack, the trigger pole moved but wouldnt pull the valve. I also need some help opening it because all the screws are imposible to get out due to rust. any help?

We should need some more information about the trigger problem to help with it. Please read the sticky threads here and post a response back when you get the water gun open.

We have a guide on how to open water guns that offers this suggestion for rusted/stripped screws:

If a screw is very rusted or the head has been damaged by attempts to unscrew, the only option may be to eliminate the screw altogether. A powerful drill, with a drill bit approximately the size of the screw's threads, can easily drive straight through the screw. Naturally, though, the case cannot reliably be held together at that point again.

well the problem is that the thing that opens the valve came off its hinge. any help?