Magento - override "OnepageController.php"

I have a problem overriding the controller "OnepageController.php" located in "app \ code \ core \ Mage \ Checkout \ controllers", more exactly on the side of xml configuration file and开发者_JAVA百科 the tree of my module, I am a bit lost in it ...

A little help would be appreciated.

Thanks a lot.

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If I'm correct you can just put your class override in app/code/local/Mage/Checkout/controllers/OnepageController.php and it will be used instead of the core class.