Admiral Akhtar

A couple more relevant considerations:
The Hella one doesnt like PWM'ing more than about 10A. The Crydom and other similar industrial ones need to be well overrated to give acceptable life, the 100A ones are usually ok, the 40A ones fail quick with just a basic pump.  They generally dont work much above 200Hz either so im surprised 450Hz is working for you. Fan controllers generally work ok but be aware there logic is generally designed to failsafe in the "100%" condition.  Whereas fuel pump controller's failsafe is 0%.  Be careful with slowing common aftermarket EFI pumps down too much that arent designed for variable speed control, many give extreme fuel pressure pulsations when the motor torque is reduced, I dont really know why but I assume the rotor speed must become unstable.  Most get pretty funky below around 45% DC.    

Have you modified the Non Vanos loom as well? as the Cam sensor is pinned completely differently to the Hall sensor used on the Vanos loom, and will need to be modified to suit 

Here's a little table from when I was helping another friend with his NV setup on a Pnp ECU
Pin VANOS CAM sensor pinout Non-VANOS CAM sensor pinout 1 +12V Signal 2 Signal Sensor GND 3 Sensor GND Shield  

You will also need to repin the TPS as they are pinned completely differently as well 

Yes similar to what you have done.  Except you wont need one for "position 1", this will just use boost table 1 which is the default.  So you would have a GP output with the condition "switch position = 2" and use this output to enable the 2nd table, then a 2nd GP output with the condition switch position = 3 and use this to enable boost table 3.  
 
Yes you could either put ethanol content on one axis of all three tables, or you could turn on the "GP Boost tables" use that to trim boost based on ethanol content.  

Look at your fuel temp. If it seems Ok then edge is correct. If it seems unrealistic then change it and see if it's closer to reality

I'm using rising, with pull-up resistor 'on' too.