Can zope be installed on the same server where Ispconfig is installed? If it can be, how do i access the site i have developed using plone?
You should be able to run zope on the same server, as lomg as the zope http server runs on another port. You might access it from port 80 e.g. by using the reverse proxy faetures from apache then.
Installation instructions for zope can e.g. be found on the zope homepage: http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/InstallingZope.stx