Clear-cut instructions on how to create mods?

[aerohead]

Originally Posted by Cryptinox

I am curious if there are any simple instructions for some of these aerodynamic and other eco-mods that don't make your vehicle look like total trash (air dam, kill switch, grille block, belly pan, front splitter, etc.) I would really appreciate it if I could find some clear-cut instructions (e.g. Step 1, diagrams, etc.) instead of having to scroll through many threads. If there aren't any, I'd appreciate it if anyone doing these mods could make such a thing or at least a video if it isn't too much of burden. I am totally new to this stuff and don't know much about mechanics as of now. I wouldn't risk doing something such as a kill switch with just a rough diagram and one thread. Thank you all in advance.

1) You could select one specific type of vehicle for us to think about ( coupe, sedan, fastback, pickup, SUV, CUV, Van )
2) Powertrain type ( ICE, Hybrid, PHEV, BEV ).
3) And how you'd be operating it ( City only, mixed, mostly highway, how fast?).
4) How much of a mpg improvement you'd be targeting.