Will FSPassengers work with very small airports?

[DanSteph]

Btw forgive me for the dumb question but I see in the database somes airport
have U.K and somes others have "England" as country name, I know it's united kingdom
but to simplify can I change all the country name to England -or- United Kingdom
or there is a good reason that some have U.K and others "england"

Thanks

Dan