Using Classifieds to create 2 different types of ads


Is it possible to create two different types of ads on one site that gets listed on different pages? I would like my user to be able to create and ad for "Im looking for this service" or "Im offering this service". These ads needs to be in two different directories/pages..

Furthermore there needs to be a search form, that makes the process easy to search for ads from the two different categories, where it would be nice to be able to choose with a chechbox before clicking search. Is that possible or can you recommend a search plugin that can do that?