: Aside from the closed window and the half opening
: air shaft door, there are no other ways into the middle contol room that I
: can find.
The Rubicon Spoiler Guide has a complete map of this level:
http://www.marathonrubicon.com/spoiler.html
You may have to go to the "Level Flow" section to find Lutfisk because I didn't see it in the pull down menu. As with any spoiler, use at your own risk...
Also, can't go wrong with the Rubicon Volunteers series:
http://home.earthlink.net/~sflevinson/RubiconVolunteers/39_Lutfisk.html
Hope that helps...