Hey S, 

Please see : http://themenectar.com/docs/salient/importing-demo-content/ . 

If you have any issues your PHP Settings are likely not correct. 

You can verify your PHP configuration limits by installing a simple plugin called WordPress phpinfo http://wordpress.org/extend/plugins/wordpress-php-info/

Recommended PHP configuration limits are as follows:

• max_execution_time 60
• memory_limit 128M
• post_max_size 48M
• upload_max_filesize 48M

Please have your hosting provider fix this for you so it can be installed correctly. 

Thanks