Hello,
sorry for delay,
you can set the main site of shared ip to default (cpanel page) 
login via SSH
1 -
PHP Code:
cd /usr/local/apache/conf
2 -
PHP Code:
cp httpd.conf httpd.conf.back
3 -
PHP Code:
pico httpd.conf
4 - press Ctrl + W
5 - search for
PHP Code:
SSL Virtual Host Context
6 - after :
Code:
##
## SSL Virtual Host Context
##
</IfDefine>
add :
Code:
NameVirtualHost xxx.xxx.xxx.xxx:80
<VirtualHost xxx.xxx.xxx.xxx>
BytesLog domlogs/server.host.com-bytes_log
ServerName server.host.com
DocumentRoot /usr/local/apache/htdocs
</VirtualHost>
in the code above, change xxx.xxx.xxx.xxx with your shared ip
change server.host.com with your host name.
7 - Press Ctrl + X then type 'y' then 'enter' then 'enter' again 
restart the Apache by : service httpd restart
try to open your shared ip you will find the default cpanel page 
Note : you can set the directory to an exist account on your server as the directory of the main site . and the server name to the domain of your main site.
i hope that i helped ya 
Good Luck
Ramy