Vice City Players, or VCP, its a new multiplayer mod.
It has Squirrel support and lots of nice functions.
Link:
ClickyIt's still extremly new, but the developers (Fresh_, Christopher, GuNNeR, Sebihunter, Adamix) are working alot on it. They are active (yeey). And the sync its not that bad at all.
I hope to see you guys creating servers, to play on. The devs, so generous and nice, released a alpha so people could start testing already and making scripts, while they develop it. (They will uptade the alpha)