I did it last week and it's easy.
1) get two carraige bolts and matching nuts, a new handle, and a drill with a bit the size of the old rivets.
2) remove the entire interior door panel CAREFULLY
3) drill out the old rivets and remove the door handle
4) put the new handle in place
5) put the carriage bolts through the handle and door and start the nuts on the back.
6) Put the rod into the holder on the handle
7) tighten the nuts using some vice grips and a wrench
8)reassemble your door, go out, pick up a hot chick, and open the door for her with your new handle.
Feel free to PM me with any ?s. Also, the reason you get carriage bolts is because they have a round head so no one can remove them from outside the car. Make sure that the bolt size is the same as the holes in the handle. I took mine to Home Depot, matched it up, and it cost me like .60 for the nuts and bolts. Good luck.