[Andrés]

I've designed the whole sci-fi crossover mod thinking in option "A". It'd be nice if you can use the same racial traits numbers to make merging later easier.

7 - Babylon tech (general available to all)
8 - Centauri Tech
9 - Earth Tech
10 - Lnaw Tech
11 - Minbari Tech
12 - Narn Tech
13 - Shadow Tech
14 - Vorlon Tech
(if you need some other racial trait you have to use 33, 34, ect.)

I was thinking that there is a limited mid point that can be interesting:
If you give a tech area a race exclusive requisit, but don't add it the racial number, only those who have the racial trait can start to research it, but others can gain it by analyzing captured ships or using intel.
In a full tech start all will have it.
It would be nice to have a few "capturable" race-exclusive tech areas, something that is not too alien to another race or sci-fi.