This is a quick solution and tested in firefox only. But it works and should be adaptable for IE and other browsers.
function insertAtCursor(editor, value){
var editor = nicEditors.findEditor(editor);
var range = editor.getRng();
var editorField = editor.selElm();
editorField.nodeValue = editorField.nodeValue.substring(0, range.startOffset) +
value +
editorField.nodeValue.substring(range.endOffset, editorField.nodeValue.length);
}
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