Replacing small coolant hose

[jgoodfellow]

I need to replace a small coolant hose on my Suzuki Vitara, 1996 2L V6.
It's very hard to access - it comes out of the back of the thermostat housing and goes down into the left bank of the engine. I need to remove some things to get to it, and I haven't done a job quite like this before.
A few questions (see pic attached):

A – this is the small tube that needs replacing
B – I have taken this off before to get to the thermostat – so I’m ok with getting this out of the way
C – this is really in the way - it looks like it goes back a fair way….can I take it out?
D & E – What is E? if I need to remove both of these parts, is that possible?
F – what is this? Can I take it off if I need to get it out of the way?

Some guidance would be very much appreciated!