Magento Provides the default customer registration form with very few fields like name,email,pwd etc. But in realtime we need to get more details from the customer during registration. In order to achieve this we may have to create custom module that extends the magento customer module.
Step 1: We Start with Our module activation file first it just specifies the module name its location and Active Status. This file must be placed in app/etc/modules/ directory as app/etc/modules/Mydons_Customer.xml