[oXygen-user] (Windows) opening up a file in different instances?

In Windows vista 64 , when I right click an xml/xsl file, a new and separate instance of Oxygen will open up. Is there any easy way to instruct Oxygen to open the file in the previously opened Oyxgen instance rather than to open up a new instance each time? -- Robert Nagle 12777 Ashford Point Dr #1417 Houston, Texas 77082 713 893 3424 htpt://www.robertnagle.info