[KillerKilane]

Hi!
I own a 2005 MG Zt-t 1.8T.
After some days with heavy rain my car would start, but went dead after a few minutes. It would then start again, but this time die out after a few seconds. I am aware of the problem with water in the plenums, and I have opened the drains before, but it seemed like there may have been some water on some parts this time. I let it dry up and after reading up on forums about "FFS" I ordered and installed fuel filter and O-rings for the In-tank-pump, and also installed that little plastic clip (former Fabled Orange Clip, now white) to prevent the fuel filter casing to come apart. It sure seemed necessary, as the old o-ring had broken and dissolved, causing the fuel inside the filter casing to be quite black. 
However, it seems my problem wasn't just FFS / lacking pressure from the fuel pump.The car would still not start yesterday, after fitting the new filter, O-rings and the Fabled Orange (White) Clip.
I turn the key to 2.nd pos., and then I believe I hear the in-tank-pump priming, as well as a sound from the engine-room (under-bonnet-pump, I suppose?). They both seem to prime for 4-5 seconds. I don't think I can hear them pump during cranking, but I could be wrong - it's hard to tell for sure. Could this point to a faulty crankshaft sensor? I have bought a replacement. Also a replacement camshaft sensor (Without the lead. I am not yet sure if this is the right camshaft replacement part). 
As I crank the engine, the needle giving the reading on the rpm seems to be moving just a little bit, not totally still.


I have also searched and read posts describing the placement of the inertia/fuel cut off-switch, but I just can't find it in my car (I live in Norway, the driver's wheel is on the left side, if that makes any difference). Is it BEHIND the glove box, or to the side? Pictures would be a great help! 
To make things worse, my passenger side front door won't open, since last winter it froze. This makes checking/changing fuses and relays under the glove box quite difficult. Haven't found out how to open this...But first things first. I'm focusing on getting the engine started.

Other things that might play a part in identifying the problem(s):
It could be electrical. Earlier I've had trouble with water on the floor of the car. Actually ended up drilling a hole through the floor. I have checked a few fuses that I think would be relevant, but I guess I'll have to do a more thorough round to check all fuses and relays (received some relays from Rimmer Bros yesterday). I swapped the under glove box-relay for the horn over with the one for the fuel pump, and it seemed like the one to the pump might have been faulty. It works now, I think.
Also, recently the airbag fault-light would appear/disappear for a few weeks time. This indicates water on the floor, I suppose? And I need to be careful about these connectors, I understand?


If anyone wanna give me some pointers, it would be much appreciated!