Wow, Moniker, that's a very nice map. I would love to see the higher res version you have. Check the "Playing with Mountains" thread to see if you like my last post. If you like the mountains and the land (ignore the rivers and their funky color gradations, I was trying something and messed up and never got back to it.), I could do something for you as long as a tight timeframe is not a factor.
Of course, If your willing, I would just as soon have you try to translate this yourself using GIMP and give you some help in the the right directions along with the tutorial(which I followed and then adapted some techniques). It really is NOT that hard. I have little artistic talent, and created the map in that thread after only having GIMP for around 8 weeks of playing around.