yes, you can map any car.
worth it on the 2.0? no.
will see around 10bhp increase if your lucky.
only good way to tune a n/a car is camms etc. which is expensive, or sticking a turbo on it. (or both as my mate has recently done on his striped out clio sport...)
on a 2.0, just go for cosmetic mods, if you really want speed then when you can afford it buy a 1.8t