I used the additive shader script in Modtools in the asset editor, I should have made additive shader a requirement (but its really optional if you want the full package) you can also use the latest version of Prop anarchy mod as an alternative, please read the description carefully before subscribing.

oh sorry, i mean what steps did u take to change them on each model.. id love to do that for my city too

Each Bus has a unique desto, One type of Bus has a different desto.

nice... how did you change the desto's?