The issue is this: the plugin "wordpress-mobile-edition" is hard coded to call for "carrington-mobile-1.0.2" So when Alex repeatedly states that you need to follow the directions where it says, "2. Drop the carrington-mobile-(version #) directory in your wp-content/themes directory" what it really means is don't try and be proactive and upgrade your mobile theme to the latest version available on the Carringtontheme.com site (which is v.1.2, I believe.)
So, you can either use the mobile theme which comes with the plugin download (v.1.0.2) or open wp-mobile.php and right around line 28 or so, change this line:
define('CF_MOBILE_THEME', 'carrington-mobile-1.0.2');
to
define('CF_MOBILE_THEME', 'carrington-mobile-1.2');
Now, as long as you have version 1.2 of the mobile theme in wp-contents/themes you "should" not get those install errors.