I just did it the way you told me but I can't make it work

it says:
DC ( the folder with all the stuff )
is not recognized as an internal or external command, operable program or batch file.
When I open the DOS it appears like this:
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\Dude>
And then I typed the stuff you said, but it always shows that message I said earlier.
So when I couldn't manage to patch it with DOS, I used the PPF-O-Matic and I patched the BIN file but when I burned it, the game didn't started, it freezes in black right after the playstation logo.
Is there any other way besides patching the file with DOS?
Sorry if I'm starting to be an annoyance, but I can't run my DC original disc or a backup DC on my PSone since 3 years ago.
Right after the message that says that the game contains gore and explicit violence, just after that a screen with a "Forbidden" sign appears and it just doesn't run.