[support] Drupal 7 Bartik and Garland themes

[Roger]

As per 
http://opensourcecms.pro/drupal/howto-drupal-7-sub-theme-creation-step-by-step/

I copied both Bartik and Garland default themes over to 
/sites/all/themes renamed them and made the alterations to .info file 
and the template.php file as per the tut and the themes worked out of 
the box.

I unthinkingly went to settings in the /sites/all/theme/bartik2 and 
garland2 to alter the footer color in Bartik2 and the blue header in 
Garland2 and the themes are now dead, they will not load. WSOD.

If I ?q=admin and change the theme back to default Bartik , Garland or 
other themes these work as expected.

I did note with the Bartik theme that I added engine=phptemplate and 
that seemed to kill it so I deleted the line but it does not reinstate.
I  have flushed caches in <Performance> and with drush flushed all 
caches, deleted browser history and have run out of ideas.
Is there a trick or some thing I'm missing.

I need a clean 3 column fluid width theme with no borders or edges and 
simple template and css files, I find the garland theme easy enough but 
the Bartik theme is very complicated, more than I need.

I would greatly appreciate help on understanding the issues and how to 
fix for the future.
Cheers
Roger