Just export your bookmarks and upload the file. Then you can choose which tags to add for each bookmark. If you don’t want to add all of your bookmarks, just choose the ones you like to add. Click the last button et voila, your bookmarks are magically added to your del.icio.us account. The script even recognizes the date, on which you’ve added the link to your bookmarks.
So please tell me if there is anything to improve and, most important, tell me if there are any bugs.