Super_Secret.EXE extraction problem (Steam)

[Subadaga]

Hi.

I'm having some trouble extracting the file Super_Secret.EXE (penumbra black plague), I have steam, so all the Penumbra Black Plague files are in a GCF file.

I tried to extract the file by using GCFScape but it didn't worked, as well I can't open the file, this same error occurs in all the files in the GCF file.

Anyone knows how can I extract the Super_Secret.EXE file from the GCF file?
Thanks.

P.D: English is not my first language, so I might have committed a grammar mistake.