Adding more media types to be available in the content manager Image tab – Joomla 1.0.8

1 – open /includes/joomla.php
2 – find this line and edit the “if ( eregi( “bmp|gif|jpg|png”. $file ) )” and add “|swf|pdf” etc.
3 – find the other line like this and repeat step 2

All media types will now be available in the Images dropdown.