Guest checkout with same e-mail without password - possible?

[Vitazzz]

 

The guest checkout creates an account and my customers are not able to create new orders without entering the password. At the same time the system does not allow to order anymore using the same e-mail. Is there any known solution or module existing for solving this issue in 2015?

 

The only thing I found is this https://www.prestashop.com/forums/topic/395506-module-order-on-one-page-ordering-without-registration-simplified-edit-the-registration-fields/ - have anybody used it? It seems to have lots of bugs

Edited May 4, 2015 by Vitazzz (see edit history)