As per the wiki, I wanna edit my save game so that countries who can research nukes do so.I opened up my savegame .eug file and for life of me can't find where the lines are I need to edit. Am I looking in the right file? Easy way to find the lines to edit? Thanks
It's more complex than that. Firstly, you'll have to remove the nuclear research techs from the 'ignore' list of the tech research.
Then, you'll have to make the countries actually BUILD reactors. Very hard really. I think DAIM (for example) forces the USA AI to build them automatically.
Lastly, you'll need to ensure that the country has researched and built a delivery system, so Strategic bombers must be both researched and built.
Simply put, there is no easy 'tick a box - build nukes' option. It requires a detailed look and modification of a country AI file and the problem then becomes, that if Germany is busy researching Nukes, then the Soviet Union will flatten them.