Assist me with in-house MAC osX Lion Server Configurations.

Hello, i have downloaded mac osX and I am not sure how to set it up. I want to host multiple IPs and domains. Eventually multiple email accounts also. Please let me know if you can help me out with this and if you can do a remote session with me? There is no other way in connecting to my computer other than a remote session. 1. I just need to know how to add additional IPs and how to configure this server to show my dedicated IP instead of my internet connection IP. 2. How to add DNS? 3. How to add additional IPs? 4. How to add additional emails / email configurations within a domain /IP. Thank you.