Angie:
OK - first let's clarify terminology. The Fill-in-Field List file only stores the information for field list group fields (the stuff you use for appearances; e.g. ATTORNEY1, FIRM1, ADDRESS-A1, CITY1, etc.).
What you're talking about is NOT the Fill-in-Field List file. You're talking about values for User Defined fields -- fields you've created vs. pre-created fields, such as [!COUNTY] or [!JUDGE] or [!CASE NUMBER] or [!INSURANCE CARRIER]... something like that.
Those values are not stored in the Fill-in-Field List - they're stored in various job or case history files. So what you need to do is what Lillian said - use Field Manager.
For example, for User specific fields, at the Manage Jobs screen, Reporter A would go to the System Files case and highlight/select the System Files_Case file. Click File, Field Manager; then click File, Export Fields. Select the fields that you want to export, then save under a file name. Give that file to Reporter B. Reporter B goes to Manage Jobs, System Files case, highlights/selects System Files_Case, opens Field Manager and clicks File, Import Fields. Browse to the location and file where the exported fields were saved and click OK. Voila, you have the fields and User-specific field values.
If Reporter A hs Case-specific field values they want to share, they would need to export those field values separately, with the cursor on the case's case history file when choosing Export Fields, and Reporter B would need to be in the case where they want to import those field values.
Hope that helps!