Jaguar has much improved Windows file sharing support, but one thing that bothered me was that it auto-filled the description to that of "Samba 2.2.3a� when browsing to the Mac from within My Network Places on my Windows box. I wished I could change this to something more descriptive. Well you can!
Open up the terminal and type
sudo pico /etc/smb.confScroll down to the [global] section and add the line
server string = A nice description goes herethen hit control-X then "Y" (to save the file and exit Pico).
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020906054858183