You arrive right in front of the exit door of this chamber. (If at
any time you need to get back to the satellite, simply approach the
windows.) Open the door and proceed to the corridor ahead. Take a
right and walk on for a while until you reach a room with a lava
pool. Continue until you reach switch 1, which you must flip.
When that has been done, return to the door near the initial chamber
that you passed before. Open it, head on past the lava and find
door A, which will now be unlocked. Ahead is a gigantic area
with the exit at the far end. Follow the corridor there to the second
door; beyond that is switch 2. Flip this switch to open
door B, revealing an intriate corridor network. You'll find
switch 3 is in the lava pool, so flip it and quickly make for
the teleporter to the east before you fry, then head back to door
C which is now open.
Behind door C is switch 4: this opens door D
at the west end of the corridor network. Beyond this is circuit
panel 5 which you must destroy to unlock door E. Watch out
though, as some monsters will appear from a secret niche behind you
as you approach circuit 5... Head for door E, which is
now unlocked. Proceed to the end of the area ahead, where you'll find
a large window, overlooking the satellite. Face the window and you
will be teleported back to the satellite. The comm terminal there
will take you to the next level, Eat Your Microwave...