how to remove airco airfilter ?

Hi all,

I just bought a spray can yesterday to clean the airco.

There are 2 methods, first involves spraying it under the hood and then you have to remove the air filter, second is making the car recycle air and spray it at the passenger side..

I had to do the 2nd because I just don't know how to get this air filter out ?

Is it possible to do this by yourself or can it only be done at a workshop ? It's a large block underneath the front window ? So the only way is removing half of the engine, or can you access it somewhere from inside the car ? If so, how ? (I have a 206SW btw)

Aeneas.