Arduino mega library for Processing

Hi, I have done a sketch, to interface some piezo elements with processing. I connected them in analog ports. Untill to port 5 they works, over not. The same thing happen with digital ports. Probably the problem is the library for processing: it is for duemilanove. I tryed to download the one for mega, but it doens't appear in processing list. Where I can find a processing library for arduino mega?