ARD with Windows

I have a newer MacBook running ARD 3 and OS 10.4.8 and need to be able to observe and control remote PC's via the internet. ARD works great with the Macs and Timbuktu works for the PCs, but I really like ARD better. Is there any way I can install a VNC server on the PCs that ARD will work with? I'd love to be able to just use ARD to control everything. Timbuktu only allows me to observe 1 PC at a time. I love ARD's ability to show multiple computers at once. Thanks!