The same principles applied to sequential files applies to indexed files. See how to:

1. Edit indexed files in Eclipse and also Visual Studio 2010.
2. Defining multiple record type layouts in Eclipse and Visual Studio 2010
3. Data file Editor options in Eclipse and Visual Studio 2010
4. Creating new data files in Eclipse and Visual Studio 2010

As usual, make sure to watch the demos -- they will give you a quick start to what you need to do.