Hi ootini
It might be worth having a go at making at least one of your curries on Friday, after you have your pre-cooked meats or veg done.
As it's going to be your first attempt at making BIR curries, it should help you get the feel and techniques sorted first, especially before attempting four different curries in one go.
If it goes wrong, nothing lost, you'll learn from it, try again.
If it works out fine, you could keep it, and re-heat it in your pan on saturday (adding a little moe gravy/base or water)
As a relative newbie myself, I think I'd find trying to cook four different BIR curries on one night quite daunting, and could get really confusing (unless you get really, really well organised first).
Cheers
Martin