Help using the define field order

[lynkage]

I am trying out Hoster to determine if this is the software I want to use for doing Karaoke in my local clubs.
I have a lot of mp3+g songs on my computer already (I was using VDJ). I do not seem to understand how the define field order works.
I have tried all the options in the drop down menus but no such luck. I really do not want to copy all of my disks again that is just not going to happen.
Here is an example:Beatles,_The_-_Oh_Darling_-_SC2069-03.mp3
Can someone help?