slimory I can not say for sure, but i do not think so SNT is useful to "see" the map in the game. you're right about the ADDITIONAL spawning objects, but only for those (eg chairs, televisions, people inside the houses). In fact I had not uploaded the object. ini the first time I installed the mod and I "saw" the same map.
just put it in your pc / data / maps folder ghost ... and copy the strings in your gta.dat images.txt and that's it. (as described in the readme)