K, well each mod MUST contain at least a script.xml (or file structure with contents) to be known as a mod that will work.
It sounds like you have two mods:
Hispania:
Script.xml
Other mod:
Script.xml
What you want to do is make it
Other mod:
Script.xml
Script.xml
Obviously that won't work, so you must rename Hispania's script.xml to hispania.xml first... and then you can copy it into that directory of the other mod - giving:
Hispania:
Other Mod:
Script.xml
Hispania.xml
Of course, now the hispania mod is empty... so delete that folder
If you are still having trouble after this, you'll have to mail the files to someone - as it's impossible to see what you've done here, and it could be incredibly simple. Just because FLMM throws an error about hispania being empty, doesn't mean it's not working in the other mod... just that you hispania mod (stand alone) folder has either no files, or no script.xml.