[Feature Request] Different models for foreground and background

[Miyuutsu]

It would be nice to have a selection to use a different model for each part. I've managed to dreambooth and merge models that are incapable of backgrounds or incapable of humanoid subjects and it would be neat to be able to mix them which would require usage of three different models. Image attached is just a sample of my idea done quickly with inspector. If it doesn't seem to difficult I would even be willing to work on this myself and submit it when I have the time.

I know you said to use the Discussions if it's not about a bug but I figured in the off chance this gets implemented or I submit it that it would be good to have it tracked for when people search if it's wanted.