its safe disc 4 i think,
it may take a while to crack but theres another way to play without the cd heres how
u need the original discs
1st use the latest version of Clone CD avaliable at
http://www.slysoft.com/
Insert CD2 in drive
use the option "write TO image file" and choose the option "protected PC game" in order for the weak sectors (safedisc 4) to be copied too
now you have an image of disc 2 that can be used to run the game, but it is too big to send to everyone all over again.
hence use the tiny image creator found at the link
http://66.79.179.19/pt/MiR.zip
to convert that Clone CD image into a tiny image containign JUST the security info (usually 23 megs)
mount the image in a virtual daemon drive and the game should rn