i have a shared server environment and do not have access as a full admin. i am not able to shut down mysql for example and they have many other programs running on the server.

here is a note from the quick install;
You cannot have any other web server, database, LDAP, or MTA server
running, when you install the Zimbra software.

can i install zimbra in a shared server environment?........i have searched and did not find an answer to this question?