It is very simple and it is all written in my previous:
the debug blckr feature simply works as folllows:
1)the program creates a mutex with CreateMutex.
2) then it checks for the mutex with OpenMutex to start as
debugger or debugged
So what you have to do is to change the return value of the OpenMutex.
....or the check after that call (tipically two calls are present).
Now suppose you simply have a program protected with the DB.
After changing the two conditional jumps, you will start with the
debugged program directly. So it will unpack itself and bla bla bla.
(I repeat it avoids only the DB protection, it there are others you have
to manipulate the code).
For the tutorial you have to ask to the author,
there is one but only written in italian and i haven't the time to
translate it.

Thanks to faina_mdc.