How to change currency position on Magento 1.7

Magento 1.7 use the currency format of Zend Framework. To change currency format, you have edit the locale xml file located into the directory lib/Zend/Locale/Data

For example, to pot the currency symbol after price, you have edit file es.xml and change:

<currencyFormats>
<currencyFormatLength>
<currencyFormat>
<pattern>¤ #,##0.00</pattern>
</currencyFormat>
</currencyFormatLength>
<unitPattern count="other">{0} {1}</unitPattern>
</currencyFormats>

by:

<currencyFormats>
<currencyFormatLength>
<currencyFormat>
             <pattern>#,##0.00 ¤</pattern>
</currencyFormat>
</currencyFormatLength>
<unitPattern count="other">{0} {1}</unitPattern>
</currencyFormats>