As long as the printer is shared by the Mac, all you have to do is "install" the printer on the Vaio. You'll go to "Settings," then "Printers," and select the "Add New Printer" wizard. When it asks, tell the wizard that you're adding a networked printer. You may have to browse your network (in the wizard) to locate the Mac, and thus the printer, but once you find it, the rest is automatic and you'll do fine.
Why does your Vaio run Windows 2000? 2000 is slow, clunky, and much too much like Windows 98-YUCK! XP is a much better alternative, and it seems to cooperate with OS X better, too.