Thanks Clive. I made up an adaptor for my FTDI to connect to my board, but it turns out I have a problem on my board preventing it going into DFU mode. I'm looking into that now.

Thanks Uwe, all looks too hard, I'm gonna get me a ST-Link V2 and use the ST-Link software. I was just trying to solve a problem on the spot, but now I'll just wait until the ST-Link V2 arrives. :)