photoshop help needed with this pic..

[helpimcrap]

its a bit big so i apologise but i was wondering if anyone could make the petrol tank on this bike plain blue.

for non bikers out theres its the bit thats white/light blue/dark blue and has suzuki on it. it needs making the same shade of blue as the rest of the paintwork on the front of the bike.

thanks in advance.

http://www.thermaldegree.com/cannell/uploads/DSC00160.JPG

edit - made to link instead!