What is app like MS Word '03 for iPad2??

There are a number of word processing apps that support word documents and which support a lot of the same functionality (though none will be exactly the same as the iPad isn't as powerful as a 'normal' computer) e.g. Pages from Apple, and third-party apps such as Documents To Go and QuickOffice HD - you could have a look at their descriptions, screenshots and reviews in the store, and possibly also go to their support pages to see if they have a manual or more info about their app and see if any meet your needs