Yes, but let me reimnd you that OpenGoo comes with the minified CSS and JS and you don't need to run the public/tools/minify.php file unless you modify any javascript (excluding language javascripts) or CSS file. You only need to define these two constants in config/config.php:
define('COMPRESSED_CSS', true);
define('COMPRESSED_JS', true);
Additionaly, you could add this following constant to further improve loading times, if it works on your system (I think you already said it didn't work for you, but just to keep it on the record):
define('USE_JS_CACHE', true);