Notes on installing VDL prerequisites

Following advice here, purchased everything available from Just Trains direct from them.
I think we are talking about these products:
Metropolitan Line & S7+1 Advanced Underground Stock Bundle
-and possible (not sure if this is needed)-
Mostly OK, but the installs must be run logged in to the PC as Administrator. Running as a standard user and using 'Run as administrator' does not work (Edge cant access it's local directory).

Next the 5 items listed as only available from Steam:
- DTG European Community Asset Pack (Steam)
- DTG US Community Asset Pack (Steam)
- DTG Great Western Mainline (Steam)
- DTG London to Brighton (Steam)
- DTG Isle of Wight (Steam)

Wasted a great deal of time failing to buy those five items through store.steampowered.com

After adding those 5 items, and completing all payment info, Steam reject the purchase because 'Your basket contains items you already own'.
Sadly, it doesn't say which item(s) it *thinks* you already own.

Did manage to purchase the Euro pack and the US pack without any errors. Steam still refuses to sell me the other three items, with the same 'already owned' error.

Eventually attempted the same purchases through the Steam app, rather than the website. That is more helpful. Purchase still fails, but says I already own the Euro pack, but something in my basket includes the Euro pack.

I never found out what, but at least the app store offers the option to go ahead and buy despite the already-owned item.

So it *seems* the Euro pack is not needed if Steam's claim that something else on the list includes it?

Completely failed to install S7+1/S8 Sound Patch (ATS)
Failed because it couldn't find a required PackageInfo file (I think for the S7+1 package).

Having a rest now, and a play with the Met before actually trying to install VDL...