This mod slightly modifies the top of Mount Chiliad and adds a springboard, a building from GTA V. The modification fits into the game.
Installation: move the folder from the archive "Chilliadny" to ModLoader.
To avoid a crash after installation, you need to do the following: go to GTA SA / DATA and use a text editor to open the GTA.DAT file and write the following lines:
IDE modloaderCHILLIADNYDC_FILESCHILL.ide IPL modloaderCHILLIADNYDC_FILESCHILL.ipl COLFILE 0 modloaderCHILLIADNYDC_FILESCHILL.col
If after that, the game still crashes, then download and install the "LimitAdjuster.asi" file in the game directory. You can download it here (click here).