Doing a "manual" install is not as daunting as you may think. It requires a "structured" approach, and there are good instructions in the docs folder of an unzipped copy of the software.
So, the first thins to do is to get a copy of the software. If you go to THS PAGE, you will see a bright blue DOWNLOAD button. Just click it and after a few seconds your screen will refresh to Sourceforge website AND a popup will appear indicating you have requested the download of the zip file for the software.
Download that zip file to your computer and put it in its own folder on your system.
Run it through an UNZIP program (eg: winzip) to "unpack" the software.
When unpacked, FTP the software to your server's ROOT web directory. The NAME of this location will vary, depending on how your host has set up the server. Common ROOT locations are inside a folder called public_html, httpdocs, var/www.
For instructions of what to send via FTP, open index.html in the docs folder of the unpacked software.
Before you can run an installation, you need to create a DATABASE on the server... Again, the techniques you use to do this will depend on the way your hosting environment has been set up. You create databases via your hosting account Control Panel, and as I said, the nature of the control panel will depend on the systems your host has set up.
A common admin manager for a hosting account is C-Panel, but not all hosts use C-Panel. Some have their own admin consoles.
You will have to ask your host to show you how to set up a database if this is not clear on your host admin console. Some provide tutorials for setting up a database. You will have to create a username and password for that database, AND make sure you assign "ALL PRIVILEGES" to the username.
Assuming that you have now successfully created a database, make sure you write down :
The database NAME
The database USERNAME
The database PASSWORD
Then, you do the INSTALLATION of the software.
The install is started by putting:
http://www.YOUR-WEBSITE.com/zc_install into your browser address bar, and hitting the [ENTER] key on your keyboard.
Then, just follow onscreen instructions.
It is important to know how to set CHMOD folder and file PERMISSIONS on a number of folders/files . Again, there are tutorials for how to do this on many places on the internet.