If you want to use new symbol of INR in your Magento e-store then you need to follow following steps:
Step 1. Add below code in root.xml
path of file: lib/Zend/Locale/Data/root.xml open file in wordpad and find <currency type=”INR”> replace next line with this <symbol>Rs. </symbol>
Step 2: Goto http://cdn.webrupee.com/js and save the page as rupee.js and save it inside /js folder of the root.
Step 3: Go to \app\design\frontend\default\your-theme\layout edit page.xml
After this <block type=”page/html_head” name=”head” as=”head”> add <action method=”addJs”><script>rupee.js</script></action>
Step 4 : Clear cache by deleting all the files and folder inside /var/cache folder. Clear cache from back-end as well.
Hope this helps !