New SH4 player

Ok, so I went against my principle of playing SH3 until SH5 came out.
I saw some screenies yesterday which I found attractive, and on my way home from school today I found this sweet deal on SH4+uboat missions in a local shop.

I'm a bit confused though, because I find no patch for U-boat Missions, but a 1.4 patch for the vanilla game.

1. Should I patch the game to 1.4 before installing the expansion?

2. Is there really no patch for U-boat missions?

3. I never install gameshadow or any other 3rd party "adwarez" that comes with games because my email inbox gets full of crap even without me adding this crap to it. So if there's a patch, I need to download it manually.
And I like to be in control by doing it myself so I have a clue what patch I'm running etc. (also storing the actual patch for later use maybe after the game is being supported on gameshadow)

Thanks, Brew