HPL

"Out of Date", all "Packaged" or "Packaged, Payware" (some tagged "Newer version available"), but none of them can be updated in Trainz...

Compatibility of DLCs is mentioned under "New Releases"; e.g. "BR Grouping Flat Wagon Pack 1" is tagged "Compatible with: Trainz Plus...

Part 4 <kuid2:82412:24501:1> • Package ID: 657 <kuid2:82412:24501:1> • Package ID: sc372 <kuid2:82412:24501:1> • Package ID: sc444...

Part 3 <kuid2:447264:1555:2> • Package ID: sc372 <kuid2:447264:1555:2> • Package ID: sc444 <kuid2:447264:1555:2> • Package ID: sc401...

Part 2 <kuid:523:19723437> • Package ID: 1106 <kuid:523:19723437> • Package ID: 1302 <kuid:523:19723437> • Package ID: 1468...

Here is the list of containing packages. You can search by ID in the in-game Store (corresponding names here if needed). Part 1...

Without the list of your unknown assets nobody can help you.

There is JR's ATSF Ce-11 Caboose. It is also included in some DLCs ("Datsun Junction", "Fall Harvest Nebraska", "Model Trainz: Chicago"...

I read in another post (about "UMR 2025") that "smousher1" is an expert in spoliation of other creators content.

No, as .cdp extension is associated with CDP Explorer.

Were from now dead Control Point Simulations' payware route "Hawaii Railway", so maybe at JR's: <kuid:155115:500002> Ford F-250...

From NARM's payware route "GILA Railway" v1.0 (in "ALCO Deps.7z"): <kuid:278716:100978> Baldwin 608A <kuid:278716:100221> FM 38D V6...

These are in "Season Town Northern RR".

You need to install "Milwaukee Road Avery-Drexel".

Trainz always does this for me: when I click "Save as CDP", a window opens to select the save location, then File Explorer opens once...