Reseller with virtual nameservers

Hello!

For the first time i rent a server with DirectAdmin as control panel. It isn't for commercial use, just for a few communitysites and some sites from my friends. The server now uses the domain names ns1.it2go.info and ns2.it2go.info. Now i want to put the sites from my friends in one reselleraccount and the community sites in another. So that i have 2 reselleraccounts. Currently the ip's are distribuates as follow:

x.x.x.71: main ip server
x.x.x.72: free
x.x.x.73: free
x.x.x.74: ns1.it2go.info
x.x.x.75: ns2.it2go.info

now i want to set my 2 reselleraccounts as follow:

x.x.x.73: sites
x.x.x.74: first nameserver (eg ns1.2goservices.net for the communitypages)
x.x.x.75: second nameserver (eg ns1.2goservices.net for the communitypages)

I also want to do that for the websites of my friends. Can anyone tell my step by step what i have to do to make those changes and create a reselleraccount with their own virtual nameservers? ps: the 73 ip is NOT an dedicated IP: i want to use that IP for al the websites i host...