Setting up a printer in Windows
Yes, it is true you can print via Bonjour, however, I just went through that myself and I found that there were a couple of things I had to do first:
1. I had to share my printer in MAC preferences.
2. And! I had to set up and enable my sharing folders between desktops!
3. I had to have my printer set in Parallels as a parallel connection
4. I had to have USB on the list too
5. I had to have my printer install disks for when I installed the printer in Windows despite what Bonjour said.
Meanwhile the printer wouldn't print after installing it normally in Add a printer in Control Panel. There was a secondary driver it needed. I am glad I was persistent. Then when I did the Bonjour, it worked fine because I had the rest of it done. Otherwise I was getting that I did not have enough permissions with my system to install a printer.
My son installed Parallels for me and he had to also before I could do anything, install a driver which activated my print spooler. Without that, I couldn't do anything but I did solve everything else on my own.