Well I am not a member of SimHQ but it does not stop me from downloading stuff that looks interesting.
I was able to use the second post as a tutorial in order to create my first mission. Having done it once I will not have to read the instructions again.
The mission maker is a bit like the parameters setting for single missions with some selections being made on the map, and others elsewhere.
Some of the settings in the mission maker and multiplayer parameters screen are not possible on the single mission parameters screen, but having learned how to set up EAW single missions it seemed easy to adapt.
The script loader was straight-forward and easy to use, and what I did like was that my mission was saved as a text file, and I can reload it and fly it again.
I have not tried yet, but I assume that I can easily move it to the Finland Summer folder and re-name it more appropriately.