PS2 Boot-CD works???

[MaxPower777]

Hi,

I was surfing on the net and a few times found files that were meaned to be working PS2-boot discs for backups- and import- games. Some of them were about 50MB others about 2-3MB. They were even meaned to be work whithout a Mod-chip. First of all I want to know if it's possible without a mod-chip and if I need a Action-Replay instead or if I only need this cd? And if it's working why my Pal PS2 can't read any of them(I found about 5 driffrent)? Perhaps I used the wrong options in CDRwin. And if it's not working can anyone tell me a method to play backups whithout a mod-chip that works? Cause my PS2 is nearly new and I don't want it to be opened. Hope anyone can answer some of my questions and sorry if my English sounds a little strange because I'm from Germany.