The only way this is going to work is if you can get the pins back in, starting with the hammer pin where it seems you are at. A good set of punches is what you really need. You can work a pin hole till you get the right size punch in (from opposite side) then work the pin in from the correct side. Then the sear trigger pin is also a ***** under the hammer spring compressed pressure. If you can get that forward pin in you may be able by hand get the sear pushed forward and release the hammer. There is no easy way or shortcut I am aware of.