Exchange 2003 and AutoDL

HI,

We need the feature that AutoDL 2.1 offers. We have found it on Exhange 2000  resource Kit (http://technet.microsoft.com/en-us/exchange/bb288467.aspx) but not in Exchange 2003.

Is this supported in Exchange 2003 and where cna I get it.

The feature set I'm looking for is

1. The ability to set managers for each distribution list.

2. A web UI that allows users to subscribe to lists they want to join

3. Automated approval request is sent to the manager

4. Users is added to the DL if approved, notified if rejected...

5. A similar process to allow users to remove themselves from DLs.

Suggestions appreciated.

Thanks.

Sujan