I disabled magic_quotes_gpc in my php.ini file and tested it with the code described at
http://www.php.net/manual/en/function.get-magic-quotes-gpc.php

and tested the status using

echo get_magic_quotes_gpc();

and it returned 0 means that i have successfully disabled magic_quotes_gpc.

Also i checked
echo get_magic_quotes_runtime();

and it printed 0.However, still i get that warning about magic_qoutes_gpc when i try to install zenphoto again. Can anyone help me to solve this problem?
Thanks!!!

Maybe contact your host.

Is the php.ini file in the zp-core folder? Personally I keep forgetting that I need to put it there every time I upgrade rather than just in the top level zenphoto folder. Php.ini needs to be in the folder in which the scripts run I think - but correct me if there is a better way - not an expert in this stuff, just know enough to generally get things to work in my own probably kludgy ways

@arvidtp: I tried your method and worked perfectly. Thanks buddy. Yeah, u r right. That was the problem.
Thanks a lot.

If the php.ini file truely needs to be in the folder where the script runs, then there will be many more copies needed. I really don't know how the file works--my provider lets me edit my server based ini file.

There are different kinds of php.ini files. The main one is for the whole server itself, then some servers allow setting special stuff via those within a folder for that folder (but IMHO that should include all sub folders). Anf for example my host does not allow php.ini file editing but I can change settings via htaccess.