[jluerken]

Ok it works with vb4.2 also with a small change.

In the "newthread" template search for

					{vb:raw disablesmiliesoption}

and add above

                                        <vb:if condition="$show['autodiscuss']">
                                        <li>
                                                <label for="cb_autodiscuss"><input type="checkbox" name="autodiscuss" value="1" id="cb_autodiscuss" tabindex="1" $checked[autodiscuss] /> {vb:rawphrase post_assigned_discussion_thread}</label>
                                        </li>
                                        </vb:if>

The change in the readme file is for older vb version where phrases where called differently.
If the phrase does not show up, create a new one of type GLOBAL with the text you want and the name "post_assigned_discussion_thread"