I saw this website but im curious how they function because i called saaq (not to be confused with saq

)
and they told me the following "in order to register this type of vehicle you must present a letter from the car manufacturer stating that this form of modifcation is permitted by them"
so far GM and suzuki both said NO for either the geo metro or the suzuki swift.. so.. WTF.. how do they do it ?
that website has a mazda miata for sale.. and they are working on a mazda 3... im confused