The "affective grid" packages comes along with a questionnaire, because this is no question type, but a combination of a question, some HTML code and some PHP code for the analysis.
The questionnaire's first HTML code contains these lines:
<table cellspacing="20" cellpadding="0" border="0" style="margin: 0 auto 40px auto">
<tr>
<td class="right">Stress</td>
<td class="center">High Arousal</td>
<td class="left">Excitement</td>
</tr>
<tr>
<td class="right" style="vertical-align: middle">Unpleasent<br>Feelings</td>
<td class="center" style="vertical-align: middle">
And then in the next HTML element on the same page:
</td>
<td class="left" style="vertical-align: middle">Pleasent<br>Feelings</td>
</tr>
<tr>
<td class="right">Depression</td>
<td class="center">Sleepiness</td>
<td class="left">Relaxation</td>
</tr>
</table>
Please change the HTML code to change the labels.