When your using TinyMCE as standalone you can set preferences trough tinyMCE.init({....
Is this also possible with the TinyMCE plugin?
With kind regards,
Edski
@Jul: to add a custom css file go to top menu: Tools/Configuration/Interface & Features/ -> scroll down and find the "Path to CSS file" area and add the path to your style sheet there. I normally create a new slim down stylesheet version just for the editor (with whichever styles you want users to access) and link to that. You can also add css selectors a few lines down at the bottom of that page in the CSS Selectors area as opposed to linking to a stylesheet.
@Edski: You should be able to add custom parameters in the Tinymce plugin edit screen in the "Custom Parameters" textarea. Looking at the code (assets/plugins/tinymce/tinymce.functions.php), I assume they should be added as a comma delimited list:
param1: value1,param2: value2,param3: value3
hope this helps
@Breezer: Fantastic! Thanks a lot! Do you know if it is also possible to add drop lists with available chunks and snippets, so that a non-expert can easily insert predefined chunk-based layouts ?