|Mac's are a little out of my area of expertise.|
The guide I mentioned pertained to Windows PC's only.
Getting them communicating is the first step certainly. Once they are, then you can see about adding the printer to the Mac. Any questions you have about configuring the Mac for the network, or installing the printer on the Mac you may want to take over to our Mac forum. As I said, they're out of my speciality.
The network settings you show above appear correct so I'm sure your Windows PC is working properly. To share the printer, you'll need to go to the "printers" folder, right click on the printer and select "Sharing" from that menu that appears. Once on the sharing window, share the printer and then you should be able to connect the Mac to it.
I'm not as familiar with Windows 7 as I am will all other Windows based operating systems so if you have problems sharing the printer on the Windows 7 machine, head over to the Windows 7 forum and ask there.
Sorry I couldn't be of more help.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.