Hello,
Please understand that custom development require time ; it's not something free.
Custom development is not provide via the support or in the forum ; it's something outside the limit of HikaShop support since it's pur development.
That's why Nicolas recommend you to contact a third party developer if you do not have the development skills to do it yourself.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.