Burned Winning Eleven 2000 boots by itself

[StingRay1969]

A few days ago I was playing with a CD-RW and with Nero 5.5.2.4 trying to back up PSX games, and I save an image of the data track of WE2000 U-23 (without saving de 11 audio tracks), and when burning again and trying on the PS-One, it boots by itself. Of course, when the audio tracks needed to be played, the PS-One started to search for them like crazy, but the game works except for the music.
I have a PS-One model SCPH-101 without Mod-Chip or game enhacer, I used a Imation CD-RW, an my recorder was a IDE Sony CD-RW CRX-0811. Always using Nero 5.5.2.4.
Can Anyone tell me why did it work? because I haven´t been able to do that again.
Another thing, a friend of mine, lend me some of his games, and they are all Verbatim Blue CD´s but they boot by themself, and I tried to burn my own cd´s and I can´t, so my console isn´t modded. He doesn´t want to tell me how does he do this, because he says he´s the only one in my town who is able to do this.