It is possible, but extremely risky. The board can easily be cut using a dremel, sander or any other such instrument. I would suggest a flat bed sander and hold the board vertically over it and the edge will slowly grind down. However be careful holding it as you dont want it to slip, plus the added feature of cutting too far and breaking the circuitry. I know it can be done since i needed to cut the RF board for a different project, but i didnt care about breaking it.
I would strongly advise against this however, though you could get hold of a broken board from ebay and test the practice first.