The Content Editor Web Part is truly the most flexible web part available in SharePoint. There are several Web sites devoted specifically to this like http://www.contenteditorwebpart.com. One of the recent articles I came across and wanted to share is one where a client wanted to change the default behavior of a document library to open PowerPoint in edit mode instead of slide show mode. Here is some pretty cool code on how to accomplish just that.
The Amazing Content Editor Web Part
Dec 14, 2010