Hi Abdul,
Creating the Name Mapping file manually by adding nodes to the file isn't a trivial task, and we don't guarantee that TestComplete will be able to work with this file.
As far as I understand, you want to migrate your QTP tests to TestComplete, right? You can install TestComplete on the same machine as QTP and run your QTP test, at the same time recording it with TestComplete. The resulting recording would probably require some manual polishing afterwards, but nevertheless, it's better when creating a test from scratch. Besides that, it can be a good starting point for learning TestComplete.