@Radammder well, you just need to create addonprops folder and build the ytyp that all. after for map you can also place the interior ig using any mapping tool and turn it to ymap.
For mor information/help you should join 5mods Discord map channel where there is already few tuto about adding your prop to gta
https://discord.gg/EAch83
@Radammder hi,
once you created your model in 3ds and exported it with gims evo, you need to add an entry in the ytyp file to add your object to gta file.
Once the ytyp is done you can use your object ig with Map Editor or Menyoo or add it with CodeWalker
You've some tuto on Discord Map channel , and you can ask your question there for mor help
@pdugery for custom vehicle you can use menyoo.
For the other thing there is CodeWalker program
Map editor is good for object placement ( fast and easy) but not that great for complex scenario
@R3dSt0rm for texture remplacement you'll mostly need to use OpenIV ( this is the tool that allow to modif gtaV file ( and more))
Is there any mod to unload the map ?
I'm working on a map, the problem is the size ( will be between 10km² / 15 km²), if i wanna add path and detail on it i've to unload the gta map so i wanted to know if any mod was allowing to unload the gta map
@R3QQ idk i don't see this kind of mod yet. And yeah would be hilarious and pretty glitchy 
seeing some bitch flying in da sky, some cougar walking in da street, some chicken drivving car etc xP I know the anim wouldn't match but that the funnyest past
@eshenk well seeing how the game file are surcharged already in ton of useless giga of texture, + increase traffic densities mod, + a lot of ymap ( if there is a tree map mod then just remove it for better perf cause they don't have vlow LoD mostly) + retexture mod etc then yeah that normal 
@NineTees you need to provide more info if you want be helped. Like what mod you installed for exemple.
Stuck in loading screen is often related to addon mods with no or wrong gameconfig. If that addon mod you need to instal a custom gameconfig to run them.
But that can be something else , just say what mod you instaled
also it's not good to make a such title, just change it to " stuck in loading screen " or something like that and ask your question in the topic with information on the mod you're using
@eshenk if you're complaining of temp and in same time running increased ped/traffic density with retexture mod (maybe graphic mod too ? ) make no sens
