If you have not backed up your WINS DataBase, the the only thing I can suggest, As you have never backed it up at all is to uninstall the WINS service and reinstall it. SORRY Thats the Price you pay for not backing up. As for downloading a resource kit or another database, the wins database is unique to every network. To back up your wins database next time,
Create a new folder on you WINS SERVER'S C: Drive called WINS BACKUP. In the WINS Console, RIGHT CLICK on your WINS Server and click BACKUP DATABASE. in the browse for dialogue box expand your C: drive and select the new WINS BACKUP folder you just created. click OK. When the BACK UP is complete Click OK. Your WINS server will now backup its data base every three hours from now on to C:\WINS BACKUP\WINS_BAK\new to restore the database just copy the contents of the WINS BACKUP\WINS_BAK\new folder to your system32\wins folder.
Regards
Neo