Magento Environment Emulator

emulator

$storeId      = '0';
$appEmulation = Mage::getSingleton('core/app_emulation');

// start emulation
$envInfo      = $appEmulation->startEnvironmentEmulation($storeId);

/**
 * do your stuff in that Store
 */ 

// stop emulation
$appEmulation->stopEnvironmentEmulation($envInfo);