[Zope] Zopehome in ZPT

Dear Zopistas How can I display the installation path of Zope in a ZPT page. Something like this should do the trick (but it doesn't): ... <form action="." method="post"> <input type="text" name="filename" value="" tal:attributes="value $ZOPEHOME/lib/python/Products"/> <input type="submit" name="importFile:method" value="import file"/> </form> ... Any ideas or hints? Thanks and best wishes Andre PS Maybe a "Browse..." button would be nice in addition to this if somebody has an example (JavaScript?).