The ALL.SPAWN file that comes with this package is optional.  It adds a new PDA info with a code to a doorlock in Red Forest, pick the info up off the dead scientist and then read your diary for the code.  The door has always been there, it was just impossible to find the code to unlock it. 

If you have a different version of the ALL.SPAWN file that is from another addon for Oblivion Lost v2.2, then I recommend you use that instead. 