Tu met ca dans les New
new Float:PlayerSpawns[5][3] = { //le 5 c le nombre de spawn diferent
{1481.8552,-1748.0847,15.4453}, // c les coord du spawn X, Y, Z
{1489.6338,-1748.2719,15.4453},
{1473.4604,-1748.1598,15.4453},
{1467.2555,-1743.1128,13.5469},
{1487.9945,-1743.3326,13.5469}
};
Et ca dans ton OnPlayerSpawn
new rand = random(sizeof(PlayerSpawns));
SetPlayerPos(playerid, PlayerSpawns[rand][0], PlayerSpawns[rand][1], PlayerSpawns[rand][2]);