Half Life - Opposing Force - Crack

[DingoBait]

Can anyone please help me with a crack for this game which will bypass the CD Verification ?

I have a CD with the game on it but another file was put on the same CD and it fails the Verification process.
I have tried ignoring the session 2 data ( the extra file ) and burning the session 1 data but the resulting CD still fails the test.
Do I have to reburn another inage from the original or is there a patch or crack out there that will help?

Any help appreciated...!