Hi,
You can just backup all HikaShop tables ( yourprefix_hikashop_... )
Then you can install the same HikaShop package in another website and copy the HikaShop tables.
About the content, the "media/com_hikashop", the "images" and the "template/your_frontend_template/html/com_hikashop" folders will be useful.
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.