When I was a collegian--I graduated two years ago--I created a songs page for my chapter website. We have words to most of the songs you've all mentioned and a couple that you haven't.
http://www.restech.wustl.edu/~dgamma/dgsongs.htm
My favorite that you haven't mentioned is probably "Mmm, Mmm My Sisters" or "What Does It Mean to be A Sister?". "What Does It Mean to be A Sister?" is to the tune of "Friends" by Michael W. Smith. I'd be happy to help any of you with tunes--just PM me.
ITB,
Angie