I'm interested in using one of the mods that allow customers to avoid the process of creating an account if they desire.

It looks like there are two plugins, both available for 1.5x and both maintained.

Fast and Easy http://www.zen-cart.com/downloads.php?do=file&id=594

COWOA http://www.zen-cart.com/downloads.php?do=file&id=1416

Are there demos available of these to try out? I've read everything I can find about them but not sure which to use.

Do these mods have any affect on PCI Compliance tests? The shop in question uses PayFlow Pro for checkout and TrustMark PCI testing.

Thanks for any input.