I looked at your reference picture, and this is not a good one to try water for the first time on... it's going to be really difficult. The thing that's always the hardest to achieve when doing foam, spray, rapids... is to make the frothing part of the water look as if it is part of the body of water, and not something just sitting on top of it. You do have a good start, but you want to minimize some of the white and go with some values in between your darkest water and the white part of the rapids.

Very ambitious to try from that pic! You've got a good basis here but do what Cindy suggests and it will be better!

...aww... good job! ... will you please start talking to me more? I wanna talk to you really bad! I miss you!!

heh, thanks for commenting and for the advises :) i'll try to do so.. but now my holidays started so i wont be around :)
for those whose holidays started: HAVE A GREAT SUMMER!!!! :)

jee jee jerry kotton, i like the stones