Hi,
I still don't understand nothing on what you want to do.
HikaSerial is a unique data generator for HikaShop. You can create generator plugin which could do a lot of things during the generation like, adding some data in another tables.
But HikaSerial has been design to work with HikaShop triggers (thanks to the bridge plugin "hikashop serials").
After that, the other checkout process are HikaShop integration, not HikaSerial.
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.