Well... If its a constant than the task of modify it would be tremendous. When the game was compiled every instance of that constant was replaced by its numerical value along all the code. So changing it on a particular place would not be enough. You would have to change it in every place that number was used in any math calculations of the game. That is just 1 of the problems... My 2 cents
I don't think the people who worked at Taldren were that inept. Then again... But anyway, when coding a program like that they would most likely assign the value to a constant symbol. For example:
int main()
{
const float Warp_Speed = 200;
}
From there they would use the symbol Warp_Speed in place of the actual value when the program is performing calculations dealing with warp speed. This helps two or more programers keep the value the same in different parts of the program. It was considered proper programing back during that time period.
So if you can find where the constant was declared, you should only have to change the value one time. The trick IMHO would be finding anything even with a hex editor. I would be interested in this because it may be the only way possible to take parts of the code from SFC OP and putting it into the CE project. Personally I don't think it would work because I think too much of the code would be unreadable.
Please note I have not done any serious programming in 20 years so if the above code looks a little off, well now you know why.