There's holes in the hinges so with the doors closed you can get a socket extention on your rachet and get some torque on the two inner bolts. I used a 1/4 socket to drive a good T-40 bit. Of course, for the front doors you need to remove the fender to get at it. You need to open the doors once the bolts get out enough, and I ended up using a 1/4 open ended wrench turning the bit to get em out the rest of the way. My ratchet plus socket plus bit was too long to get in there for most of them. A small 1/4 inch ratcheting wrench would have helped but all I had was metric..
I think normal hex head bolts would be easier since you could just stick a ratchet or wrench in there without remove fenders,etc..