magento overwrite core controller

source <config> <frontend> [1] <routers> <checkout> [2] <args> <modules> <yourModule before=”Mage_Checkout”>Namespace_Module_Overwrite_Checkout</yourModule> [3] </modules> </args> </checkout> </routers> </frontend> </config> [1] Depending on the controllers area ,”frontend” or “admin” [2] Router node…

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