Ifly 747 Cargo convert

[Alfredo Pacheco Jr 966120]

Hey all,

I do have an issue that I am having some trouble approaching. I would like to know how to go about configuring the Ifly 747-400 cfg file to be able to make it into a 747-400F. I don't know how to add/change the weight and balance section, and fuel section to match the 747-400F. Also, if I was to do this by myself, it would be ok. But if I am asking publicly, do I need to recieve permision from the original designers?

 

I ask this 'cause I can't afford the PMDG 747-400.