I'm not sure exactly which database it is, but someone did a really clever edit where they just used the regular editor and added every nation into the EU, therefore meaning that they could be of any nationality but work permits wouldn't be a problem.
Actually, I've just remembered, its the Free Transfers database where no-one has contracts, so that's not ideal for you, but it is a clever work around, and if you want to do it yourself I think it works like this:
- Load Editor to preferred database
- From the left menu of areas in which you can search, select Nations
- Then search for Brazil (for example)
- The bottom left menu now has new options, the second one down of which is "Information". Select this.
- The bottom option is now a section called "Agreements". Click Add and then search for "European Union". Choose the only available option and press add
Hope that helps
--------EDIT:---------
There's one more thing that I think you need to do:
- In the same left hand bar where you choose "Information", choose "Nations Treated as EU"
- Click Add, and then you get five options. Bring down the search box underneath "Agreement" and again search for European Union, and add it.
I think that's it!