Writing names for tickets

Hello!

I read carefully your well made article about the new rules on passenger identification since Mars 1st 2014.
I am a little bit worried about the names on the passport vs. the names on the train ticket.

In my case, I have one last name, a first name, and three additional names on the passport.
So paspport looks like this.
LASTNAME
NAME1 NAME2 NAME3 NAME4

Should I write all names for the train ticket (I usually only use NAME1 to book)

Best Regars
William