Need Windows to share Mac printer

I have searched and found many cases where Mac user wants to share a Windows printer. I admit I have not been able to do that yet, but it is not the direction I want to go. I have a Brother laser printer connect by USB to my iMac (Lion) and I want my wife and my laptop and my netbook to be able to share that printer over my network. The printer is new and is not ethernet or wireless and I can still return it to Amazon and spend the extra $$ for a network printer, but I would rather that the Windows computers (XP, 7 and Vista) be able to print on the Brother attached to my iMac. I have downloaded assorted drivers to the point of confusion, turned ON printer sharing, turned ON & OFF file sharing (I would rather not share files, just printers if possible). Is there a simple solution for my conundrum? The Windows machines can see my iMac but not the printer.

Bingo! Problem solved...Thank You

Bonjour was just what I needed. With it installed on Windows I was able to see my iMac printers and after that it was easy to set up just as I wanted.
Thank you for your help.