Definitely try it. You will eventually find a way to do it. Obviously, in an ideal situation, the OEM recovery would work! But it obviously does not.
I have done things like this a few times, mainly using "Trial and error" and "Flying by the seat of my pants" as it were. It is more difficult if you don't know exactly what is going on. All you can do is persevere and hope that one of the methods works.