The other thing I've had to do is cut off pins PB10-PB15 (the six at the bottom). They are odd pins for counters and so on, but nothing too important. If I do need them I can always plug on the top of the board.
The next part involves building a serial interface. Unfortunately, RS232 (the PC serial port) and the STM board don't like each other, so I have to build a little bit of circuitry to convert the voltage levels.