reseller ip to website of reseller

i hope this is the right place for this question:

I assign an ip to my reseller account and his website shows up.
when i setup more accounts for this reseller [ or he do it ] then you type his ip address in the IE or Safari then a client of him show up.

reseller - nameserver ip 1 and 2 and all customer accounts on this ip
all clients of the reseller use only this 2 ip addresses.

how can i setup the resellers main website showed up if you type the 2 ipaddresses in the browser ??? [ permanent ? ]

thank you

 

it needs to be the first entry in the httpd.conf of the assigned reseller ip address.