To install webapplication on your website please follow the following steps:-
1) Login to Plesk 9.x control panel.
2) Click on "Web Applications".
3) Click on "Install Web Application".
4) Insert the application name in the search box and press "Enter". Once you got that
application, click on "Install" button.
5) Accept the license aggrement by clicking on check box "I Agree" and then click on "Next".
6) The application installation web page will be opened. You need to insert all the details
which are marked with red asterick. Once you have inserted the details please click on
"Install button".The automatic script will instal the application automatically on the
desired path you have specified.
7) Once the instaltion is completed you can access your application from the
web browser by inserting your domain name and the directory where you
have installed the application.
8) Your Web application has ben Installed on your website.