Though there is two other custom campaigns "based" off the original AoE1 Trial Campaign, this one was converted directly from the AoE1 Trial maps. So that the terrain features and most stuff is almost exactly the same as in the original except for needed substitutions due to game differences.
Do not ask me if there is a tool that will convert maps for you as I'm pretty sure there isn't one. I did the conversion my self by deleting all non-compatible units from the map prior to opening it in the AoK game. I then re added AoK equivalent units back to the map and make the correct victory/trigger settings. I used the game's map editor to do all the map work and used MS-Paint to fix the scenario instruction maps.
I have tested them all after I completed them and they all are fully playable and victory is obtained the same way as in the original. Only two of the maps actually needed triggers. The rest are standard Conquest modes. In the "Fall of the Mitanni" map, instead of a "Artifact" that you must brink near your base, you must instead garrison the relic at your monastery.
This is the very first campaign I have made of the AoK series. Prior experience with the original AoE game helped get started with this game quicker.