Epson Stylus Photo R200 driver built-in Windows 7??

Yes. Download the software from here if needed - And for the driver just connect the printer to the PC and turn the printer ON and Win7 will take care of that update automatically.
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Epson Print CD v2.0
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Epson EasyPrint v3.10
Epson EasyPrint is a software utility that makes it easier for you to adjust printer settings. You can select printer settings right in the Print window, without having to click the Properties button. Epson EasyPrint is already included with Epson Smart Panel 3.2 and Epson Copy Utility 3.0. Click the Download Now button for more information.

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http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?oid=29081&prodoid=37368464&BV_UseBVCookie=yes&infoType=Downloads&platform=Windows64&x=31&y=10