Restoring Event Viewer Logs?

On a Win2k Adv. server that we do a full tape backup each night, I need to restore the Event Logs from last week. The logs were cleared and that data needs to be brought back. The logs were in their normal Windows state (non-exported). Is it possible to restore the event logs and view what happened last week? What would the filenames be or directory structure, etc that I need to selectivly restore. Thanks! 🙂