I plan on attatching a little note saying along the lines of:
"Thanks for the 1977, 1980, and 1983 versions of the Star Wars trilogy. I'm disapointed that I had to buy the 2004 release disks as well, and since they hold no value to me and I don't want them, I'm giving them back. Here you go.
Signed,
Me"
Then Lucas will know.