I did some updating on the beast, but I have to be honest - the mower files are really bugging on me. Somehow faith doesn’t want me to finish this thing or something - both the .max and .obj aren’t working properly. If I do the ‘explode’ function on the .obj, every single face will detach. That’s not really what I was suspecting it to do. 
Anyway, my hands are itching; I know how to do shaders, modeling, texturing, everything. The only thing that bothers me is the mower file.
Maybe .3ds would work - it’s a well known file type, I bet 3dsmax 'll import it the way I want it to.
If nothing works – have no fear. I just deleted the mower from my file, so anyone could very easly just download my file, and insert a textured/shaded version of the mower (without the long handles, that’s about everything that needs to be changed!). The rest are just seperate models, I barely touched the original mower model.
I knew you would say that softdistortion.

