Thank you very much!
i KNEW the river map from wilbur somehow could be used!
Also many thanks for providing another technique for mountain shaping! I think im going to use it for the other part of my map... Its a continent (so it is much larger) - and it has got more articulate mountain ranges.

P.S. Till now i used Chuck's metod of mountain shaping [Award Winner] Photoshop Mapping with Chuck It is a good and interesting method, but not for a map of a large continent with a net of thin mountain ranges (especially if the ranges shouldn't be random). I have almost abandoned my plan to make the whole map - that is why i started with the island
P.P.S. The metod doesn't belong to Chuck, but Chuck describes it - and the link to the author of the method is dead...
http://www.jezelf.co.uk/tutorials_map05.htm