I also own one of these printers and investigated 'making it wireless' so to speak. It was already set up through sharing so my wifes PC could use it, this of course meant my PC had to be on for it to be used. I found that you need to buy a 'print server' to make this happen. One possible choice below. click here
This article explained how.
In the end my wife bought herself a wifi printer so did not need to take this any further.