To clarify, are you trying to copy the pictures from your memory card to the computer? You are just using the memory card interface on the Officejet 8600?
If so you can access the Memory Card on your Officejet 8600 by following the steps below. (The steps below are for Windows XP, Vista, and 7. If you do not have either please clarify what operating system you have.)
Go to "My Computer" and at the top should be "Map Network Drive". Here you will add the printer IP address as such ex. \\192.168.1.100\memory_card\ and you can also choose the drive letter. This should map your printer memory cards to that drive letter. If you have any problems let me know.
I found a thread by ShlomiL that explains how to do the same steps on Mac OSX.