Создаёте глобальный блок и суёте этот код!И поискоуик гугла у вас на сайте
Code
<center>Поиск с гугла<center/>
<center><form action="http://www.google.com/cse" id="cse-search-box">
<div>
<input type="hidden" name="cx" value="003610019870140127171:np1wmjwoane" />
<input type="hidden" name="ie" value="UTF-8" />
<input type="text" name="q" size="31" />
<input type="submit" name="sa" value="Поиск" />
</div>
</form>
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">google.load("elements", "1", {packages: "transliteration"});</script>
<script type="text/javascript" src="http://www.google.com/coop/cse/t13n?form=cse-search-box&t13n_langs=ru"></script>
<script type="text/javascript" src="http://www.google.com/coop/cse/brand?form=cse-search-box&lang=ru"></script><center/>