Hi fateme,
and welcome to our forum! For using jOpenSim, you first need a working Joomla! Website. You can download Joomla! for free at
www.joomla.org/
. Over there you also get lot of help with installing it. I strongly recommend to install the latest version, which is currently 2.5.4.
Once you have installed Joomla, you only need to go to the "Extension manager" in the administration panel of Joomla and install jOpenSim in there using the zip file you can download here at
jopensim.com/downloads1/viewcategory/19-comopensim.html
. If you download the complete package, you will need to unzip the downloaded zip file first and then install the single zip files that came out of it.
You will find help about configuring jOpenSim in the readme.pdf that is included in the zip file (or you also can download it seperate from
jopensim.com/downloads1/viewdownload/17-...eadmeversion022.html
).
I hope this helped you for the beginning
Greetz
FoTo50