I had the same issue, and was finally able to make it work...it is possible
On decorativeplumbingonline.com, you can checkout without registering, and all info IS passed through to Hikashop, name, address, e-mail, etc...
Visit our site, put something in the cart and try it, you can quit before you need to enter payment
This only works with business version.
First in the Hika config under checkout>login & registration choose "no" for login, "no registration" for registration and "no" for display email confirmation field.
In checkout workflow you should have cart, then login, then address.
A link & message to allow account creation was added in views>login.php using html
In hika config I did a language override: HIKA_REGISTER="Continue"
You should also review my previous post on this issue...
www.hikashop.com/forum/4-how-to/82487-mi...-check-out-step.html
PLEASE NOTE that I did this awhile ago and not sure I remember all the steps, but test it first, I believe this is all I did...AND PLEASE...be sure to do a back-up first.
Hope this helps.