Let me start with the easy bit first
Issue 2
Now you have flashed openATV you can see the video wizard.
1. select your TV resolution and then 50or 60hz
2. On the tuner setup wizard, just press OK so the box can detect the satellite you are plugged into - if it can. If it can't, you can manually select the satellite you are looking at.
3. On the network wizard screen, you setup your wireless. So plugin the good wireless adaptor before you turn on the box and sort your wireless out.
Issue 1: Once your box is connected, you can then use the surface pro to open webif in your browser.
http://zgemmah2s will probably work, but if not get the IP address of the box. (blue button -> Network - and then adaptor settings maybe?)
WooshBuild Infinity will error for sure as it will be scanning 28.8 satellite. This isn't an issue as everything else will be installed for you. You can then setup your TV freeview as you did before. You may need to uninstall AutoBouquetsMaker as it will keep trying to scan 28.8 unless you can set it up for your sat, but I doubt it.
See how you get on. We are here to help.