1. Open the application configuration in change mode
By default the configuration is mapped to HRESS_CC_MENU_OVP which is standard, now change it to the configuration name ZHRESS_CC_MENU_OVP by clicking on 'Assign configuration Name’ as shown in below screenshot.
CONFIGURATION IN PORTAL :
To reflect the ESS Welcome page in portal
in Content Administration -> Overview iview
change the configuration name property with 'ZHRESS_AC_MENU'