The only question I have is on the below point. Should I copy each of the files in the exisitng directories to the new ones. I was of the opinion that the database backup and restore will do everything.
Point 6 -
Copy the data for each option to the new 64-bit install directory. Example Copy the data from theinstallation_directory/data/location to the new installation directory in Windows.
Looking at the instructions it would seem that the data in those particular directories is data that has been exported from the DB probably due to regular DB maintenance. So if needed, it would have to be copied over manually.