This is quite useful and really works. You can get faster internet speeds out of OS 10.2.6 as seen in this story: http://www.macfixit.com/article.php?story=20030804075938404 I used the terminal script. And measuring from download.com went from 291 k/sec. to 441 k/sec. (then to 404k/sec.) It may only be for broadband. I do not know.