Follow these steps to use this extension:
Prerequisite / Installation on a TYPO3 < 4. 1.6
If you want to use this extension on a 4.1.5 or lower you have got 2 options:
Update to the version 4.1.6 or 4.2. with a lot of other nice options and features! or
You need to change some lines in a file of the core extension css_styled_content.
Take this diff bugs.typo3.org/file_download.php or if you don't know what a diff is or how to apply it you just can take the already modified file from ext/rgmediaimages/res/class.tx_cssstyledcontent.pi1.php and override the file typo3/sysext/css_styled_content/pi1/class.tx_cssstyledcontent.pi1.php but don't forget to make a backup!
Follow the next steps in the following section.
Install the Extension
The steps for the real beginners are:
Select your root/first page.