please someone teach me ...

[osam]

Hi, 
please someone teach me about this error message:

--------------
001: The messege file <name> is invalid. The program cannot be 
loaded.

Explanation: The .MSG file is invalid. This problem could be the 
result of a corrupted file, a bad translation, or an outdated 
file version.

Action: Either update the .MSG file with a valid copy or delete 
the file. The DOS Requester will use the default messages that 
are bound to the binary files.
--------------
about the last sentence,
1. Does "a valid copy" mean "a valid .MSG file"?
2. Does "the default messeges" mean "the default .MSG files"?
3. What does "the binary files" and "are bound to" mean?
4. Does the DOS Requester use the default messages *if no action 
is taken*?

Thank you.           Sam