We are working on this.

>>And I would also like to see <I> not <em>.

We will add a new property in the next version.

Editor.UsePhysicalFormattingTags Property

These are two types of text formatting tags -- logical formatting tags ( <strong> and <em> ), which describe the information in the element, and physical formatting tags (<b> and <i>), which specify its appearance. By default CuteEditor use the logical formatting tags ( <strong> and <em> ). If you want to use the physical tags (<b> and <i>), you can set this property to true.

>>Or are we able to change these things ourselves

Yes, you need to use Regular expressions:

For example:

   h = h.replace(/<STRONG([ \>])/gi,'<b$1');
   h = h.replace(/<\/STRONG>/gi,'<\/b>');
   h = h.replace(/<EM([ \>])/gi,'<i$1');
   h = h.replace(/<\/EM>/gi,'<\/i>');