[Serusers] Newbie question

Hi, I have installed SER and asterisk on a redhat enterprise 4 linux box. I would like to find out how to: 1. configure SER so that when people dial 9,2226665555 it will redirect the call to asterisk for processing and forwarding to PSTN 2. I heard mentioned several times how asterisk can provide voicemail for SER clients and I would like to know how to set this up so that user can login to their mailbox 3. I would also like to know how users can be notified of their message indicators. 4. In addition to the info above I would like to know if there are links that describe this in greater details. Thanks, Mario