If you use Ubuntu Linux (and probably this is true of many other versions of Linux), it works without any installation. And if you use non-Epson cartridges it doesn't give you the irritating 'nag' dialog every time you print, unlike the Windows installation.
OK, so you're not going to switch to Linux just to get your printer working, but if you also have other problems it's worth thinking about giving it a try. After all, it's free and legal.
John
February 2009