I believe that would be feasibly impossible... apart from some trains, every vehicle equipment grid is unique to itself, and when you factor in the various mod support, the list of vehicle grid settings to adjust would become increasingly long. Twice as long, considering each grid is made up of 2 dimensions, and it's easier to read these settings if they are individual numbers, rather than a combined string or list of strings.
It might make more sense for you to use.. wait, is this the only vehicle grid mod on 2.0? That doesn't seem possible, there were so many other mods that did this in the previous version. I was gonna recommend the one by Optera, but it's not updated yet. Weird...
I mean, what exactly did you want to customize? If it's just vanilla vehicles, it wouldn't add too much to the settings list. If you wanted to customize every modded vehicle, that would be a bit too much.
EDIT: Actually, now that I think about it, it might be possible to do this as a separate mod, reliant on this one to create the grids, and then apply the customizations dependent on which vehicles exist. Then cram all the additional settings into that mod instead, so that the main mod doesn't get bloated.