Assuming you boot with the Utility Disk, the Universal Patcher 1.5 needs to be applied to the CD. So the result of what you downloaded and burned should be taken onto hard disk with CDRWin, patched and burned back. That should work if all other conditions are workable.

If there is a file called PBPX_952.01 on the CD made from the IRC download, then it's already patched by UP and something else is wrong. Downloads can be dodgy.