Rng abuse and 0% growths for FE10 LTC

[UsedChicken]

I've been looking into trying a 0% growths run of Radiant Dawn but I had a few questions for the community. 

1: I understand generally how to burn rns and whatnot in FE10, what I'm not sure on is how one actually determines the numbers to begin with. I know there's software for a lot of the older games that reads off upcoming rns and allows players to burn through until they get something favorable. Is there anything like this for FE10 or is it just trial and error, loading a save if you don't get the outcome you want? 

2: Setting 0% growths involve modding the game file. I'd rather not spend several hours sifting through my files and the internet to do this so if anyone can tell me where exactly in the game files this is done (or if there are any existing 0% growths roms out there) I'd greatly appreciate it!