Hi,
You have to use the "switcher" mode for the "display method for registration".
Then in "Registration" setting, you can select a registration mode (classical, simplified...) and also "Guest".
The user will have at this moment the choice during the checkout.
www.hikashop.com/support/support/documen....html#checkout_login
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.