I have a 4 in 1 PSX CD game, when boots up on the PSOne, it shows a menu and you can choose which game to play with....
but when i put it on my messiahed ps2, it doesnt work, i wonder if there is a way to rip out the games from the CD so i can just burn them on 4 separate CDs so it would work on my ps2 since i have already sold my old psone
can anyone help?

I dont know about this but you can try the ps2 forum.
http://www.cdrom-guide.com/forums/forumdisplay.php?s=&forumid=15

Moving it.