Since you would be using Samba (SMB) to connect the two over the network, it wouldn't matter what version of Windows you're running. IT should work fine, barring any issues wiht OS X Panther and SMB which has been a known issue. Not sure though if it was resolved in 10.3.9, the last revision of Panther. Tiger (10.4.3) doesn't seem to have this problem based on my experience.