Once you have FAI, you're set. There is nothing left you need to do.* If something needs to be done, the FAI will know better than who what has to be done and how to do it. If it turns out it should have been written by Christians, it will tell some Christians how to write an FAI and make sure they do it correctly. Worrying about what to do after running the program is like taking a cup of water with you as you flee your burning house, so that when the fire department arrive you can help out.

*except those things the FAI judges it would be good for you to need to do, which are not relevant here.