How to unpack EUROP2014 and combine W/E/N

I have unpacked the zipped parts of Europa N/E/W + the OFM(EU2014), which holds the .exe to comine the 3.: but there are still these 4 folders. What to do next?
It’s a pity that no Attachments can be put here.

Staat allemaal in de handleiding “Installatie OFM geheel Europa.pdf”, Veldfiets.