I am not sure what you are up to. Have you got your own mod made, inside of Freelancer Mod Manager? If so, then here is what is needed:
Mods\Your Mods Name
Two folders inside of this then - Data (which contains all your modded files etc), and also EXE folder. if you don't have an exe folder, then I suggest you make one
Next up - go into the EXE folder, and you will need to have your own Freelancer.ini file in there!
So - goto your Freelancer\EXE folder, and copy across the Freelancer.ini file. Also put in your empty dll file (or custom one etc), and then open up the freelancer.ini file
Open it up, and then add your dll files name to the bottom. So you get:
[Resources
DLL = InfoCards.dll ; Contains all infocard text resources
DLL = MiscText.dll ; Contains other bulk text resource: rumor, offer, and mission text
DLL = NameResources.dll ; Contains names of things, primarily.
DLL = EquipResources.dll ;Contains names of equipment (in string table) and infocards for equipment (in HTML resources)
DLL = OfferBribeResources.dll ; Contains random mission offers and bribes
DLL = MiscTextInfo2.dll ;Contains MP UI elements as well as other misc. text
DLL = whatever.dll
If you wish to add a comment so you know what the dll file is - then add it with a semi colon - like
DLL = whatever.dll ;new weapons/systems names
Save that off. Now you should be able to load up FLED-IDS, and navigate to your MODS directory - so thats Freelancer Mod Managers\Mods\Mod Name Here
When you do - you should then be able to goto the selector, and find your own custom dll file is in there now. Find out what the first number is for that file, and start editing.
Afterwards, as long as you have given all the entries in the ini files (like the weapons_equip.ini) to the correct things, you should be able to activate and then play the mod with custom names. Deactivate the mod before adding any more.
If you cannot get any 'templates' of other numbers, copy across the DLL files listed in the section of Freelancer.ini file into your mods exe folder, and try again