George i found this:
You can create a PDF file from a Quark document using Acrobat. The desktop version of Acrobat comes with Acrobat Distiller which can convert the Quark file to PDF.
According to the Adobe Create PDF Online web site (http://createpdf.adobe.com/index.pl), native Quark (qxd) files do not appear to be supported for online conversion. However, the service does support PostScript (.ps) files. If you can save your Quark file as a PostScript file, then you can use the Create PDF Online service.
Hope this helps and thanks for writing
from: http://en.allexperts.com/q/Adobe-Acrobat-2186/Converting-Quark-5-0.htm
i hope thats work for you
regards