Good evening:
I also have a hp-officejet-6600 and I have follow the steps on this posting. I was able to installed HPLIP file. I use the USB initial set-up to complete my initial installation. I want to take advantage of the wireless operation of the printer; however, as I completed the wireless set-up the computer and the printer have not been able to communicated with each other. I have attempted to set up the wireless several time with out any success. If anyone have any suggestions please reply!