Hi, analyst! I do not have that much experience with RoboHelp products, so the information here is a cut on the notes/comments I had from my mates in India.
Map IDs (files) are used to create F1 help for specific topics in an online help. You should embed the IDs in the app on your own and then ask the tech writer to just give you the ID file (.h text file). You use the ids to lay the topics to the intended targets in the UI of the app. To create the map IDs, you go to the Project tab of RoboHelp, and create the same in the Context-Sensitive Help folder.
There should also be a quick start guide for Macromedia RoboHelp X5 somewhere in the doc repository on Macromedia web ...
Hope it helps you some.