Hi! Thank you for your purchase š Thereās no set way to put the individual mech piece assets together, you can assemble them any way you want, to make any kind of mech you want! In terms of software, an image editing program should be all you need (I use photoshop). I donāt have a tutorial for this pack specifically, but I made a video for my modular tavern asset pack, and the process I used there is exactly the same. Hope it helps!