In reply to Kyle Warlow:
Get yourself a cheap angrygrinder, a half decent 18V drill, and a small set of cobalt drills you won't regret it.
Security screws (which it weirdly sounds like your 'rivets' may be) can be removed with a sharp cold chisel and a small hammer. Cut a nick into the screw edge then chase it round with the hammer to unscrew it.
Are you sure the bulkhead can be safely removed? Depending how well tied in it is it's potentially providing a lot of stiffness. Even if versions exist without the bulkhead they may have an additional hoop fitted.
jk