i am trying to get a dell printer to work with my macbook, but have had little success so far. it's a dell inkjet photo printer 720. now, i know that dell's printers are really just rebranded printers of other brands. i've determined that this dell printer is a lexmark inkjet z615. i downloaded the mac os x drivers for it off the lexmark website, but that doesn't seem to work. system profiler says that the printer is connected to the usb port, but when i run the printer setup i downloaded from the lexmark website, it says no printer is connected. and yes it's properly secured. what to do? thanks.