We've the default TinyMCE installation where hitting the button to create in the HTML editor causes it to be show up inside a popup window. With something similar to Wordpress, the HTML editor is simply another tab within the TinyMCE box, the industry better alternative.

Can you really setup TinyMCE therefore the HTML editor just pops up in another tab of some kind inside TinyMCE box itself, as opposed to a popup window? (ala Wordpress)

Thanks

I do not think so. Based on TinyMCE:Configuration you can easily set whether you would like dialog/popup home windows to spread out like a normal browser window or simply a modal dialog.