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Your welcome!
Best way to view a new theme and edit it without messing with your users on your site, is the use the theme block.
Make the theme block only viewable to webmasters. Then put the theme you are editing only available to you in the theme selections and not as your default theme. Leave the default theme the way it is.
Then you can work on your new theme and view it using the link in the theme block. If something goes wrong with the theme, you only have to take the theme off your own account in the xoops_users and you won't have to mess with the config table and your users won't see the blank or messed up theme.