all the instructions are in the
readme.txt of the myred folder.
i assume that you have already extracted the files.
so basically:
you just edit one file [myred/includes/vars.php]
rename your current index file to home
upload all the files so that you have a new index.php and a .htaccess
run
http://yourdomane.ext/myred/setup.php
delete setup.php and upgrade.php
then go to
http://yourdomane.ext/myred/admin.php and login as the administrator username and password that you have selected during setup.
again its all in the
readme.txt
hope this helps