Problem with value list sourced from another file

When you create a file reference to another FM file you can access value lists from the other file. However, you don't get the option of showing a different field instead of the index field (i.e. a field that means something to the user). I know that I can include the table from the other file in the relationships graph and then create a value list from it. Then I can make the second field appear. Is there something I'm doing wrong with accessing the value list directly instead of having the table in the relationships graph?