We have previously posted the solution for INR symbol. But that was playing with code, finally we were able to solve that problem in easy way. Here it goes:
Step 1: Goto: lib/Zend/Locale/Data/root.xml
Make changes in root.xml
find <currency type=”INR”> replace next line with this <symbol>Rs. </symbol>
Step 2: Goto: http://cdn.webrupee.com/js
save the page as rupee.js and save it inside /js folder of the root.
Step 3: Goto: \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.