If the disk is truly a region 0 [zero], that means it is NOT region coded or there is NO region code on it and it should play in all region DVD players.
However, if it is a PAL format DVD, then you will need a PAL format player to play it. It doesn't matter what region code it is, if it is PAL encoded, then you will have to have a PAL player to play it. If you have an American NTSC player, it will not play.
Most recent European DVD players (PAL) will play an NTSC DVD but not vice versa, i.e., NTSC players won't play PAL disks.
Your problem is not the region code, but the TV standard that the content is recorded with. If it is REALLY important for you to have a copy, you possibly could have a video service bureau make a standards conversion copy from PAL to NTSC, but I suspect that most wouldn't do so because it would violate the copyrights of the studio that produced the disk/movie/content.
But your problem is not the region coding, but the TV standard the content is recorded in.