8
I haven't test it but you might try the following as an example.
Open the file /include/submit.inc.php and find the following lines:
// ANSWER
$answer_text = new XoopsFormDhtmlTextArea(_MD_SF_ANSWER_FAQ, 'answer', $answerObj->answer(), 15, 60);
$answer_text->setDescription(_MD_SF_ANSWER_FAQ_DSC);
$form->addElement($answer_text, true);
Replace the above line with these lines:
// ANSWER
include_once(XOOPS_ROOT_PATH . "/class/xoopseditor/koivi/formwysiwygtextarea.php");
$answer_text = new XoopsFormWysiwygTextArea(_MD_SF_ANSWER_FAQ, 'answer', $answerObj->answer(), '100%', '400px');
$answer_text->setDescription(_MD_SF_ANSWER_FAQ_DSC);
$form->addElement($answer_text, true);