[wicked]

Hi all, I have just discovered this game while taking a short break from close combat, I decided I wanted to play a turn based ww2 game. For a while. I have to say this game is awesome and its a lot of fun just working out the game and how it plays.
I do have a few questions about the command structue though
I have read the guide and even have it on my phone so I can check it but iam unclear on a few things.

If for example I buy a company of rifles which has g0 h0,h1,h2,h3, i0,i1 etc, and then want to make them motorised and I buy some halftracks, do I put the halftacks under g0 command? Or are they seperate alltogether? Allso the same for hmg squad, do I need to assign them to g0 aswell?
Also if I buy snipers do they need to be assigned to the company they will be working closest too or is the default ok for them?

Another example in a long campaign I was trying I bought a gurka company and then bought some colonial rifles, can they be assigned to the gurka hq or is that a bad move?

Is there a command structure tree that can be seen to show how it all works?

Can this game be bought in the uk?
Thanks. I have more questions but can't think what they are till I play again

Dylan