Not sure, if this is useful, but here I go.
To get the scenario working I took these steps. Many will already know how it is done, but maybe some passed it over, not knowing how to proceed.
1 - download the rar file for the scenario on page 1 and the unit1/unit2 rar files.
2 - unzip the three files in any folder or location. I tend to put all dl files into one place with sub folders.
3 - copy or cut and paste the scenario to the conquest scenario folder.
4 - copy all the folders within the unit1 and unit2 folders to the scenario folder.
5 - copy the biq of the scenario from that folder to it parent folder (named Scenario).
Now you can play it by selecting it from the Civ-Content of the game menu. Given that I will be 75 next month, I may have screwed this up, but I hope not. Anyway someone will correct me, if I did.