Hi,
OK, I see.
At this moment, you have to create a new plugin based on "HikaShop free orders validation Plugin" in order to change the status in the plugin (if you modify the plugin directly, you will loose your modification with updates).
The plugin already contains an option for "Send confirmation email". So you can validate the order and not send the email.
But for the moment, the status "confirmed" is hard-coded in the plugin (plugins/hikashop/validate_free_order).
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.