Magento read / write config values from model
You can create Magento config settings using XML files, or… do this directly from model. Here is example:
$value = "My Config Value";
Mage::getConfig()->saveConfig('MyVariableName', $value);
Mage::getConfig()->reinit();
Mage::app()->reinitStores();
Reading this value is much simplier:
$value = Mage::getStoreConfig('MyVariableName');
