You can still get this mod installed in 2019
Go to this link and download the Installer: https://web.archive.org/web/20160911010501/http://backtothefuturegta5mod.weebly.com/
Then i picked somewhere (my Data: D drive for instance) for the installer to install the files required for the mod
And then i just inserted all those files into the game manually using OpenIV
5mods on Discord
You can still get this mod installed in 2019
Go to this link and download the Installer: https://web.archive.org/web/20160911010501/http://backtothefuturegta5mod.weebly.com/
Then i picked somewhere (my Data: D drive for instance) for the installer to install the files required for the mod
And then i just inserted all those files into the game manually using OpenIV