Four screws is not a big deal. Use a 1/4" drive ratchet with a short extension and a socket, I believe 8MM. You can have the belly pan off in less than five minutes.

There are two overlapping belly pans on my 203 car and it took some messing around the first time to know that the rear one comes off to access the engine drain plug, once I learned that, it is now an extra five minutes for the belly pan off, and another five to get it back on.

Merry Christmas,