I found instruction that the text of "Shipping & Handling" can be changed from /app/code/local/Mage/Sales/Model/Quote/Address/Total/Shipping.php
I also want to link the text to a url. I tried to insert <a href=""> from above file and /app/locale/language/Mage_Sales.csv file, but neither way worked out (syntax error).
Can someone please help? Thank you.