Finally got a NoCD Patch running...
The Fixed Exe from
www.megagames.com does NOT Work, but the Patch Instructions are right.
You need a Version WITHOUT the Safedisc Shit.
So I fixed a Exe I made with Safedisc Annihilator and patched that.
To download, you can grap my fixed exe here:
Mechwarrior 4 Mercenaries NoCD
Please look in the Download Section on the left Side.
Hope it works for you.