Generate account numbers with Auto number

Access 2003 question:
Does anyone know how to set up an automatic account number generation in 
Access? I suspect that it can be done with the Auto number, but not sure
how 
to do this to allow for a never ending amount of accounts. 

Is there an add-in or secondary add-in that can do this? I would like to 
incor****ate the date into the account number if possible. 

I am construction a new database that formally did not have account
numbers 
attached, the client was using the address ast the PK.... 
Any help will be greatly appreciated. 
Thanks
-- 
Jacqueline Staley