: I have been playing this level for a while and I am rather frustrated. I hit
: the two switches in either end of the cargo bay regoin (they only stay
: "on" for a few seconds) and I hit the switch above the lava with
: a charged plasma shot, but the final computer is to high for me to reach!
: I have been trying to granade myself up so I can hit it real quick but I
: have not been succesful. Help please?
You might want to bookmark the Marathon Spoiler Guide - it contains all the tricks you should need. For this particular level, the trick is that you need to turn in mid-air. You need to take the series of elevators up, one at a time, and jump to the next one by leaping around the walls that are in the way.