[TYPO3-RTE] How to use my own CSS

[rocky]

Hey,

Is that possible I could add some HTML tags by myself so I could fully 
control the content presentation through CSS. For instance I can use the 
extention to define the page title as h1

Here is the code
####
<h1> Home </h1>
#####
Is that possible I could add a div to wrap them up?
like this
############
<div id=pagetitle><h1>Home</h1></div>
###########

Thanks in advance!

Rocky