the bits you change in themellons post I have highleighted red change them to your webpages home do not forget the last / e.g.
www.woskf.co.uk/
<HTML>
<BODY>
<FORM method=Get action="http://www.google.com/search">
<TABLE bgcolor="#FFFFFF">
<tr>
<td>
<INPUT TYPE=text name=q size=25 maxlength=255 value=""><INPUT type=submit name=btnG VALUE="Search">
<input type=hidden name=domains value="
http://www.cableforum.co.uk"><br>
<input type=radio name=sitesearch value="">World Wide Web<input type=radio name=sitesearch value="
http://www.cableforum.co.uk" checked>
Name of Your website
</td>
</tr>
</TABLE>
</FORM>
</BODY>
</HTML>