[Zope] where zope should be installed

Hi, Let me kindly know whether we have to install Zope at the root directory of the Linex machine. B'coz When we tried to install zope at the directory 'root/home/pgmtool' Zope got installed but when the ./start was run it gave the error as 'z2.py permission denied'. what may be the problem ?. Do we need to install zope at the root directory only ?. Please throw some light. Thanks, jacintha