CKeditor4 - BasePath - Config by class

Hi,

I'm a bit new to CKeditor 4. I want to configure my CKeditor base path and not the current default path.

What I did is:

<script type="text/javascript">
    CKEDITOR.basePath = '/bundles/bundlename/ckeditor/';
</script>

Now the first load goes oke. But the second load for the contents.css goas fault, he want to get the default path again :S

console:

"NetworkError: 404 Not Found - admin/page/2/contents.css"
"NetworkError: 404 Not Found - admin/page/2/plugins/about/dialogs/about.js?t=CAPD"

How to fix this?

My second qeustion.

I want to give my textarea's a class to put the ckeditor on it. "textEdtior" and want to add a config on that, but how to? I checked the documentation but diddn't found what I need.

Thnx