It helped a lot Now I still don't know if my ground plane on the bottom side is fine or not (i removed the top layer ground plane). there's a program called EAGLE that creates the plane once you draw a polygon and name it like the ground on the board. Does it do it right or not? Hell if I know.

A snapshot of the boards (when there were still a ground plane on both layers)
http://users.edpnet.be/charlesetchri...0kit%20pcb.jpg

By the way: I'm not using any RF device and my pic runs at 8MHz, 5V.