[lachild]

Sure you can... In 4.0.x here's what you need to do.

Locate the following in /skiln1/help/contactus.tpl and remove:

<tr valign="middle">
<td class="FormButton">{$lng.lbl_subject}</td>
<td><font class="Star">*</font></td>
<td nowrap="nowrap">
<input type="text" id="subject" name="subject" size="32" maxlength="128" value="{$userinfo.subject}" />
{if $fillerror ne "" and $userinfo.subject eq ""}<font class="Star">&lt;&lt;</font>{/if}
</td>
</tr>

Then add somewhere in the form:

<input type="hidden" name="subject" value="Your Subject Goes Here">

Hope this helps.