Download Package
From OpenEMR Project Wiki
Hopefully you actually have the package and just need to know how to open it and then what to do with it.
Prerequisites:
Apache
PHP4
MySQL
You can get the most recent OpenEMR package at:
http://sourceforge.net/project/showfiles.php?group_id=60081
For Linux (unix) you need somefilename.tar.gz such as
openemr-2.8.0.tar.gz
I use my usual login user:
$ tar -zxvf openemr-2.8.0.tar.gz
$ mv openemr-2.8.0 openemr
$ su
$ mv openemr /var/www/html/