Hi,
Well, I don't know what modifications you made exactly and what you want to reprocess exactly but if it's just the order full price and the order taxes ; you need to call the function of the HikaShop order class.
HikaMarket is processing special stuff, but if HikaShop already have code for that, I prefer to not rewrite and just use it
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.