I don't use Genie Scout, complete waste of time if you want to play an honest and realistic game.
Lewis_P, I recommend you get some good quality scouts with good knowledge of different locations and send them all over the world. Try continents, or specific nations full of quality. Eg, send 1 to the UK and Ireland, but maybe another to England, if you're in an English league. Send 1 to Europe, maybe another to another continent. I always have a good scout in Brazil. I snapped up an unbelieveable keeper from there. His stats were around 18 - Reflexes, 16 - Aerial Ability - and he was about 17!
AARP, try replacing your current scouts with better ones, if you're having difficulty. I don't know how to increase your scout capacity, however.