The following instructions show how to map a network drive to your SharePoint 3.0 site. This will allow you to drag and drop files to and from your SharePoint site.
1. In Windows, select the Start menu and select My Computer.
2. Select Map Network Drive.
3. In the Folder type "//sharepointdomain.com" (omit quotes).
4. Select Finish.
5. Enter credentials and press OK.