Please Help Me Getting Metal Slug To Run

[Quiest]

I got the NeoGeoCD iso, inside are a lot of mp3 files and a "metal slug.cue" and a metal slug.iso"

So I just put the cue and the iso in a zip and copied them over to my memstick.
I don`t copy the mp3s cause I just have a 32mb stick, so I`m going to play without sound.

But everytime I try to run the game, I get the following error:

"Could not open IPL.TXT!"
"Error: Error while processing IPL.TXT.#"

What can I do to make it run?

 

[Quiest]

Never mind, I just out of curiousity extracted the metalslug.iso with ISOBuster, and copied everything over, now it works.