Phew..
Then this won't work at all. As I wanted to store the NPC's ingame adresses the player already met in a struct, and display them like an adress book would do, these struct will always display all adresses, but not only a selection. Additionally I planned to give the player the possibility to add some entrys, too. As I don't know these "free entries", there's no way to code it with a struct or struct array..???

That's really bad.