Hello,
I didn't understood your first question, so can you give me more information about what you really want to do ?
If you want to enable your customers to checkout without registering, you'll just have to
- Go to "Hikashop->System->Configuration->Checkout"
- Set the "Display method for registration" option to All in one page
- Set the "Registration" option to Guest
Note that the Registration / Display method for registration options are only available through an Hikashop commercial version, so YES you'll have to use a commercial version to do that
.