I dunno, the first few weeks of my internship I had to do the same thing. If nothing else it was a great way to learn about what the company did by doing low-level grunt work. However I'd really recommend that if this is all you'll be doing for the duration of the internship, maybe look for something else.
Otherwise be thankful that you'll eventually have the flexibility to choose a career path that doesn't require you to maintain compliance with IE6.