You can easily create a new chart, just copying the existing one and making the necessary improvements. You can import a csv file into existing chart. You can enable the 'User ports' feature then users will help you update and add information to your chart (they will be shown once approved by admin).
Make sure your site's URL is equal to mosConfig_live_site i.e.www.site.com will work, but not site.com.Maybe your server has denied the rule to run scripts outside the www root folder.Please make sure all comparison charts files have 644 permissions and folders 755.
[chart, charts, comparison, component, copy, free, html, insert, joomla, joomla 1.5 poll, Joomla components, Joomla extensions, joomla poll, joomla polls, Joomla software, joomla survey, joomla survey component, joomla surveys, show, site, trial, user]