confused about patch

[imageguy2001]

Ok, I read all the guides, got the ps1 w/4-wire classic mod chip installed, downloaded all the utilities and was ready to burn my first backup. I went to the patches section at megagames to check for my game and there are three different versions for the same game, now im lost- what is the difference in these patches?

PAL/NTSC Selector
NTSC-2-PAL Patch [PAL4U]
NTSC-2-PAL Patch & License Fix [Z2K]

Also if I install a stealth chip would that mean I would only need to patch EA games? and if I use GameShark with my current chip could I avoid having to patch at all?


by the way I am in the US so I have a ntsc console.