I think that key of changing starting materials is in lines:
rsrc_coal_discovered=4627512,
rsrc_coal_turnsleft=33,
(there is similar for every material, I think that key to get infinite suply of all of those one would have to triple both of those (and do similar change to other materials). Warning this haven't been tested and I am definetely not sure what happens...)
convuranium_discovered=173901,
convuranium_empu=0,
convuranium_produced=21036,
convuranium_production=1056,
convuranium_production_ceil=1056,
These lines contains information of how much uranium there is and how much it is produced at start... Again I think that by adding 0 to end of all these strings you could turn whole world to work with only fission power (notice though that second line is strange)... And this haven't been tested either
forestry_annual_change_base=-519,
these lines contains information of how much forest countries will lose per year, turning it all to positive would mean that world would eventually turn to paradise.
forestry_annual_change_temp_product=1,
right under it, would make game play itself if line over it would be turned positive. Basically by making countries product at start say 1000 new forest and each forest changing temp by 1-2 climate disaster should be prevented before game even starts.
defense_drought=0,
defense_erosion=0,
defense_famine=0,
defense_flood=0,
defense_sealevel=0,
defense_storms=0,
defense_wildfire=0,
These lines contains country resistance towards climate disasters, I'm not sure how it works yet, but setting everything to 1 at start should prevent disasters (atleast in the beginning)
risk_coastal_vulnerability=27,
risk_drought_chance=8,
risk_drought_severity=8,
risk_erosion_chance=5,
risk_erosion_severity=5,
risk_famine=-6,
risk_flood_chance=5,
risk_flood_severity=2,
risk_heatwave_chance=20,
risk_heatwave_severity=9,
risk_storms_chance=8,
risk_storms_severity=3,
risk_wildfire=11,
Lines tells to game whats chance that new risk borns and whats severity of it, Setting all to 0 means that country won't ever have any risk of any climate changes, setting all to 1 would mean that there is little risk.
After that game tells when new technologies comes, setting all to 1 means that you start with all techs.
Thats all I have this time, remember I haven't tested anything so this all bases just to reading code while I have been boring on work.