@Dispel:
So you're on 4.0, and no CORP.
So you need to install a corp'd IOS55 (for MPT) and a corp'd IOS60 (for 4.0 sysmenu).
Extract the DARKCORP package on the root of your sd, and then open up the config.xml in wordpad.
It's found in sd:\DARKCORP-v1.
Yopu'll see a line for every corp IOS at the start of the xml, in the tag. Just comment out or delete all the lines except for the ones that install IOS55 (0000000100000037) and IOS60 (000000010000003C). Don't get confused about the other sysmenu IOS though.
Then run the installer, and it will only "corp" those 2 IOS, provided they are the only ones you leave in the xml.
And since you have the DVD5 version, only MP1 and MP2 will work.
@toño88:
Do you mean Step & Roll?
The PAL version works fine for me...
Which version of the game are you using, and what happens when you try to load it?
Which sysmenu do you have?
What does the Sysmenu or game do when you try to load it?
Do you have Startpatch/preloader?
If so, which hacks do you have enabled, and which do you have disabled?
You have to be VERY specific with your answers, especially a description of how to recreate the error, that way I can try to diagnose and fix it.