metroid fusion--got to sector 5, got freezing missile data, when going out, got stuck

[cmr4]

metroid fusion--got to sector 5, got freezing missile data, when going out, got stuck. How do I get out of sector 5?

[p-well]

First go to the room with a single plant in it, it's right from the saveroom. Freeze it, jump up on it, fire the roof, jump up trough the hole and the go left. Here, kill the suckercrab two times so that the plant grow. Freeze it and then run to the left in hyperspeed. Go trough this room. Next go up till your way is blocked. This is the part where you once before entered trough the floor with hyperspeed. Stand under these blocks and shoot the wall to your right. Then you just make your way back to the navroom. I guess this post is old and that you've already know the way out. But it might be helpful for someone else with the same problem.