PHP error: Use of undefined constant DS

Hi all.

I'm learning Joomla ( starting now ), and have just downloaded Hot Responsive. If I install it into a Joomla 3 setup and select it, everything breaks, and I get errors:

[Sun Mar 10 16:45:42 2013] [error] [client 127.0.0.1] PHP Notice: Use of undefined constant DS - assumed 'DS' in /var/www/localhost/htdocs/templates/hot_responsive/index.php on line 99, referer: http://127.0.0.1/administrator/index.php?option=com_templates&view=styles
[Sun Mar 10 16:45:42 2013] [error] [client 127.0.0.1] PHP Warning: require(/var/www/localhost/htdocs/templates/hot_responsiveDScss/template_css.php): failed to open stream: No such file or directory in /var/www/localhost/htdocs/templates/hot_responsive/index.php on line 99, referer: http://127.0.0.1/administrator/index.php?option=com_templates&view=styles
[Sun Mar 10 16:45:42 2013] [error] [client 127.0.0.1] PHP Fatal error: require(): Failed opening required '/var/www/localhost/htdocs/templates/hot_responsiveDScss/template_css.php' (include_path='.:/usr/share/php5:/usr/share/php') in /var/www/localhost/htdocs/templates/hot_responsive/index.php on line 99, referer: http://127.0.0.1/administrator/index.php?option=com_templates&view=styles

I assume I'm missing some libraries. Any ideas?

Also ... I the 'hot_responsive30_hotstart.zip' file appears to be a complete Joomla installation. What exactly am I supposed to do with it. It's not documented, as far as I can tell.

Apologies for the newbie questions. I did spend time looking around before asking ...

use this solution:

www.hotjoomlatemplates.com/support-forum...nstall-problem#26017