Paul, what he is trying to do is just change one column and leave the others the same.

The easy (yet ugly) solution would be to go to the columns tab and change column 1 to read \"_______Column 1________\"

A bit more in depth but much nicer looking, would be a Free Format question where you essentially designed your own grid. I've typed up a simple example you can put into your Question HTML section:

<table border=\"1\">
<colgroup>
<col style=\"width:100px\" />
<col span=\"1\" style=\"width:200px\" />
<col style=\"width:100px\" />
</colgroup>
<tr>
<th></th>
<th>Q1</th>
<th>Q2</th>
<th>Q3</th>
</tr>
<tr>
<td>Option A</td>
<td><input type=\"checkbox\" name =\"1-1\" /></td>
<td><input type=\"checkbox\" name =\"1-2\" /></td>
<td><input type=\"checkbox\" name =\"1-3\" /></td>
</tr>
<tr>
<td>Option B</td>
<td><input type=\"checkbox\" name =\"2-1\" /></td>
<td><input type=\"checkbox\" name =\"2-2\" /></td>
<td><input type=\"checkbox\" name =\"2-3\" /></td>
</tr>
<tr>
<td>Option C</td>
<td><input type=\"checkbox\" name =\"3-1\" /></td>
<td><input type=\"checkbox\" name =\"3-2\" /></td>
<td><input type=\"checkbox\" name =\"3-3\" /></td>
</tr>
</table>

Let me know if this is what you were looking for

Grid question change width collum A