I'm zipping up EVERYTHING I downloaded, including working cockpits I found, some of it is not needed, so please work that out, and post things that are wrong or right, I can then edit my post.
From the readme for idisplay
Here's the whole damn lot. For the Virtual Cockpit all I needed was the stuff in the VC folder, then I ran the VirtualCockpit.exe, I set it to Hurricane and pointed to the monitor I wanted to display on, then started it up. It will ERROR until you are spawned in, then be blank. I had to alt+tab to windows and back, fanny about a few times, into game to get it running and tbh you may need the engine actually running before it works properly - it's a bit awkward to get going sometimes but I haven't found the knack yet.In your case you are talking about using a Tablet as a second screen. There are two ways to get a second screen on your gaming PC, either simply plug another monitor into the second video output of your video card or use a couple of applications (software) to connect your Tablet as a second monitor. So, first lets get the Tablet connected. Here is where you need the "Air Display" App on your Tablet (or "iDisplay" App for a MAC Tablet although I think Air Display works on the Mac devices too). Next you need the PC application which you will find is a free download where you buy your Tablet App from. Install the Tablet App on your Tablet and the PC application on your PC. Now start the Tablet App and then start the PC app and the PC App will find the Tablet and "connect it" as a second screen. It connects over your home network Wifi, it is not a wired connection. OK, so far you have connected a Tablet as a second screen instead of simply plugging a second monitor into your video card.
Getting the instruments onto a second screen is a separate matter. That is where you need the VC application (software) on your PC. You don't 'install' it, you just unzip it to a folder of your choice. When you start it you can select which cockpit layout you want to use, select the monitor you want to display it on (probably #2), select 'Scale to monitor' so that if the layout is for a different resolution to your Tablet/second monitor it will fit it as best it can, then click on Start. Odd messages may appear on the second screen until you are in a cockpit. Now when you go into a CoD cockpit it will display the instruments on the second screen.
Things to be aware of (I'm putting this here to save coming back again later):
1. I gave up on using my Samsung Note 8 Tablet because it kept losing the Wifi connection. Just a warning. I now use an old monitor plugged into the second socket on my video card (see attached image).
2. The cockpit selections are kept in their own folders under a /Cockpits/ folder where the VC software was unzipped to and it will already contain some depending on which download you take from this Thread. You can just add more cockpit folders into that Cockpits folder for them to appear on the list and you can get them from other posts in this Thread. You'll see what I mean when you unzip it.
3. If you 'Scale to monitor' you may get squished layouts but someone here is likely to be able to help you with that. If you don't 'Scale...' and your screen isn't the same resolution as the layout design it can either partly disappear off the screen or simply be smaller than the entire screen. Suck it and see.
4. Actually its not difficult to create your own simple layouts if you look carefully at how other people have done it.
Good luck!