wireless printing?

Here is the scenario:

My printer is connected to my imac via usb, i want to print wirelessly from my windows xp laptop (bah i know windows, was i insane when i bought that, j/k) i know how to wireless print from windows to windows but not windows to mac so can someone give me a step by step procedure.

thanks
Graham Barnes

in Mac,...turn on printer sharing

in windows,...(bah you know,...windows)

Add Printer >
Network Printer >
URL = http://macsipaddress:631/printers/print_queue_name_on_mac
use post script driver,.....

but if that fails you try this.