Actually, that last post was completely false. You can get it here. Aside from that, there are hundreds of mods to play with. While it isn't what you'd call in an accessible state, there are blind GTAV players, even though the community is rather small. You will want to check your system requirements, because even though the game is a few years old, its always being updated, and even though you won't use them, your computer must meet the minimums or things will be very jittery and shaky, if the game even runs at all. I will also warn you that it will take patience to get the mods installed. I also don't know how well the new script hook will go in if its not through Steam, as Steam keeps the game up to date, and the script hook will not run if the game is out of date.

Also, here are some tricks to get Steam in more of a usable state. When purchasing any games, do  it from the steam website http://www.steampowered.com, not from the client.