first of all, you must have a website made with FlatNuke, and you need for a version starting from 2.5.9 beta, namely a nightly snapshot, download the last here: Flatnuke nightly snapshots
download Flatnuke, install and configure it.
copy the directory none_indra in sections/
copy the 3 files create_*.php, in the dir include_redefine/, to include/redefine/
copy the javascript roundedcorners.js to include/javascripts/
copy the Indra base theme indra_basic/ to themes/, and set permissons to 777 for indra_basic.xml file inside
copy the file 01_Indra_theme_editor.php to include/blocks/login/
... use Indra
change the value of $theme to indra_basic, in config.php
copy your logo, or banner, your background image and the FN motd.png to themes/indra_basic/images/
open your FlatNuke+Indra webpage, and log in as Admin
then you can click on the link at the bottom of Login block: Indra Theme Editor and edit the indra basic theme. In Indra Theme Editor some white buttons appear, clicking them you'll open the panel: for configuration of each Indra section:
moreover you can download other Indra themes and edit them
remember that not all style values are edited via Indra, you have to edit themes/[indra_theme]/style.css, for better customization
remember if you use the FN theme selector block: Indra themes are not compatible with classic FlatNuke themes, you have to rename classic theme folders adding the prefix: none_ , or delete them
... create an Indra Theme
choose one of Indra Themes from this site, and download it
copy the theme to your themes/ directory and rename it with a name like: indra_the_name_I_want, rename the xml file inside with the same name of the directory, like this: indra_the_name_I_want.xml, and set its permission to 777 (chmod 777).
edit the Indra features using the on-line Theme Editor, edit other style values on style.css, and if you know html and a basic php edit also structure.php