Try using the drivers for win2k here.....
The Main Driver for Printer: ftp://ftp.epson.com/win2kdrivers/inkjet/SS2000P.EXE
Twain Driver
ftp://ftp.epson.com/win2kdrivers/inkjet/SS2000SN.EXE
Download and install both files into windows.

Although Epson said that winxp will support your printer, but you will not able to do the following things:
Ability to check your ink levels

Ability to print at 2880dpi (if your printer supports that resolution)

Advanced Color Management features

Advanced Page Layout features like watermarks, multi-page support, or doublesided printing (if your printer supports this feature)

Hope this Helps!