First of all, with all the animosity you are going to have between the USSR and the USA/NATO, it is going to be very difficult to assure a scenario in which the AI does not declare war and use nukes. A lot of people born after the 70s really have very little idea how many times we came really close to nuclear war. Let's just say the entire world was pretty lucky.
The AIs are always very reluctant to use nukes. But that's not true if the said AI has 20 nukes ready to destroy the world
This can go pretty much like a "what-if" game, WW3 or not, sudden peace between USA and USSR who become allies and conquer the world (lol...)
Regarding victory conditions, I would recommend you include a time condition. If you begin the scenario in May of 1960 and have it the turns run monthly until January of 1990, that will give you a 500 turn scenario. I've studied Soviet history enough to know that the collapse of the Soviet Union was pretty inevitable, so that seems like a good place to end it. But if the space race is going to be a victory condition, then really the only viable player options should be USA, NATO, USSR, and China. Was this your plan? I think you should at least allow for Domination and Diplomatic victories as well.
You suggest Marathon speed with a turn limit of 500 then? The problem is, the game doesn't start to separate turns into months when playing Marathon untill 2000 and late. And this is a no-mod scenario, so...
As for Africa, you will need to consult an Atlas (and probably an Encyclopedia). But here is what I know from my limited knowledge. Zaire/Congo, Liberia, Gold Coast/Ivory Coast, Angola, Botswana, Morocco, Algeria, Kenya, Namibia and Ethiopia are all pro-Western states so they should be included in the ADEIMO. Sudan, Libya, Somalia, Mozambique, Mali, Central African Empire/Central African Republic, Senegal, and Madagascar are all pro-Soviet states so they should be included in the ASIMO. Nigeria is pro-Western. Egypt is Cautious towards both Soviets and the West. As I said, remove the Free Saharan People and replace them with Israel (represented by Tel Aviv, consult an Atlas for proper placement), who is pro-Western.
Useful list. Thank you.
The problem with North Korea is I can't see having them without South Korea. However, I believe you still have a spot open, so you could include them both. South Korea should be at a Cease Fire (they are technically still at war today; they never signed an official peace treaty) with North Korea. South Korea has a defensive pact with the USA and Japan but not NATO. North Korea should have a defensive pact with China and open borders with the USSR.
North and South...The map is just so small...but it has room so let's get to work
Vietnam was probably the most important proxy war of the Cold War. IMHO you have to include it to make a credible Cold War scenario. I realize that makes two civs, but you do what you gotta.
I am sure you that lived through that time period or are American learned the history of the Vietnam war. But I do not meet these conditions, so I know almost nothing about this. Don't worry, a Wiki search will do just fine.
As for cities, are you actually gonna place cities all the way up in the Yukon and the cold depths of Siberia? Because if you don't, the AI will. There is no way to disable settlers in the WB, but it is a really simple thing to do disable settlers.
In the rough draft map, I did it with Siberia. Impossible to place more cities that were already there. I did not try it with North America, of course...and since the map designer made Antartica an actual continent, I have experienced many players before settling on there. What's the damn point?
(look signature for explanation)
The best soluton is to edit the land out of it.
UPDATE ON MY SITUATION:
-After I started building the rough draft of the scenario, I realised that, because of some small errors, I had to start it all over again. So, to make sure it doesn't happen this time, I need to be completely sure of, at least, the list of civs to include and possible map changes before I start adding cities.
Thanks to all you guys for helping out, but we're just getting started with this