Probleme mod_rewrite

[Gabriel Puscuta]

Mai am asa ceva:

domeniu.ro/cauta.php?usr=1&log=1&q=ceva+de+cautat

Pentru tipul asta:

RewriteRule ^cauta/(.*)$ cauta.php?q=$1&rewrite=1%{QUERY_STRING} [L]

Merge perfect daca scrii direct: cauta/ceva+de+cautat

EDIT:
Asta e formul:

<form name='search' action='search.php'>
<input type='hidden' name='usr' value='1' />
<input type='hidden' name='log' value='1' />
<p>
<input type='text' name='q' size='60' value='<?php print (isset($parts[1])?"":$q); ?>' class="search"/>
<input type='submit' onclick='if (!document.search.q.value) {alert("Va rugam introduceti un cuvant cheie");return false;}' value='<?php print translate("Cauta"); ?>' class="button"/>
</p>
</form>

Cum sa fac si pentru primul?
Mersi