I had a look at the script - you can change the timeout on line 1000. It is currently 5 seconds, change it to something like 30 seconds.
if(is_resource($_fopen_test_resource = stream_context_create(array('http' => array('timeout' => 5.0, 'ignore_errors' => FALSE)))))
P.S. It might be a good idea not to run arbitrary scripts that you download from the internet - just sayin.