[TYPO3-RTE] Is it possible to add new button for some special char

[Styrmir Magnússon]

Hello

I was wondering if I could add two new button to the RTE of TYPO3. I am
thinking of the buttons to add quoted sentence, because in Icelandic we
don't use "hello" we use „hello“. I have seen this solved as a buttons
in RTE at a internet newspaper homepage (not TYPO3 page).
My question is if this is possible without massive PHP programming of 
the extension.

Best regards
Styrmir Magnússon