Accoding to this website the epson sx200 uses the gutenprint driver.
You need to install cups and the gutenprint package and maybe some other files. Check your manual on installing software.
When you have installed cups, you need to start the cups deamon.
Again, this will vary from distro. But usually it is something like this
In your web browser, enter in the url
You may be prompted for the root password.
You will then be presented with a wizard like webpage. The directions it pretty self-explanatory.