Box needed adding on website - Quick Fix

Hi, I have a site that needs text to be able to be added on the right hand side. Currently, It is an image file, and I just need a text box adding on top of that image with no border so that I can add the text in that I require. There are six page in total. And It is the same thing in the same place required......... If someone could do this on every page (It will just be a copy and paste thing). That would be great. Regards Lewis