I was able to get my wireless printer ( Lexmark ) to work finely after 7 months to work on my Macbook. Even after calling Lexmark and Apple and going to the Apple store. It took having the airport express hooked up to my modem. :)
I'm now able to use my x4580 wireless w/ a USB but not w/o. I have moved the pde folder to my desk top but I have not trashed it. I have phoned apple and lexmark and no one is able to help me :(