To find the layout name in Magento

<?php
   $oRequest        = Mage::app()->getRequest();
    $sModuleName     = $oRequest->getModuleName();
    $sControllerName = $oRequest->getControllerName();
    $sAtionName      = $oRequest->getActionName();
    echo 'Current Page Layout Name:<br/>';
    echo '"'.$sModuleName.'_'.$sControllerName.'_'.$sAtionName.'"';   
?>
Now you can use the call the layout name on your xml file
<?xml version="1.0"?>    
<layout version="0.1.0"> 
    <catalog_product_view>
        <reference name="content">   
          ....yourcode..... 
        </reference>
    </catalog_product_view>
   
    <checkout_cart_index>
        <reference name="content">   
          ....yourcode.....  
        </reference>
    </checkout_cart_index>
   
    <checkout_onepage_index>
        <reference name="content">   
          ....yourcode.....   
        </reference>   
    </checkout_onepage_index>   
    <checkout_onepage_success>
        <reference name="content">   
          ....yourcode.....  
        </reference>
    </checkout_onepage_success>
   
     <wishlist_index_index>
        <reference name="content">   
          ....yourcode.....  
        </reference>
     </wishlist_index_index>     
       
    

</layout>  

Hope this will be useful for someone