I didn't do anything to prep mine. Didn't find any hoses with residual fuel pressure in them.
Access is easy - you just lift up the flap in the carpet and lever the cover out with a flat blade screwdriver.
Once the cover is off, you can see the fuel lines which unclip from the top of the tank. When these are unclipped you tap the locking ring anticlockwise until it comes free.
It's then just a case of undoing the internal fuel lines and unclipping the pump from it's mounts.