first off, contact him to make sure he has given you the IP address of the domain, not the IP address of the nameservers!

if its the IP address of the nameservers, ask him for the URL instead

if its the IP address of the domain, go to godaddy and use their advanced DNS tools to setup the records as indicated by boyfunk above. Make sure you delete all other records as well. (all those cname records are pretty useless!)

Before you can access advanced DNS, as Corey Bryant mentioned, you have to be using godaddy's dns servers. These are the default parked nameservers and will be something like PARK1.SECURESERVER.NET. If you do not have those as your nameservers you will have to unlock your domain, then under change nameservers, select to use the default parked nameserver, then lock your domains again.

Please note that every time you do a change (eg, unlocking the domain) it may take a few minutes (upto an hour) before you can move onto the next step....just be patient!

cheers,
Luke