I don't think it's possible at this point. I remember how annoyed I was upon discovering my HP PSC2210, which I bought from an Apple store, was not compatible with an Airport Extreme Base Station for wireless functioning.
However, using GIMPprint I was able to activate wireless printing only, but not scanning, copying, or faxing. This actually makes sense since if I"m scanning, faxing, or copying, I need to be near the printer anyway...