...

local skin_team = {
    "2": "Team 1 - Swat",
    "3": "Team 1",
    "4": "Grupo 1",
    "102": "Team 2",
    "103": "Team 2 undercover #2",
    "104": "Team 2 undercover #3",
    "117": "Team 3",
    "143": "Team 3",
    "157": "Team 3 Chica #3",
    "180": "Team 4 Vercitti #1",
    "147": "Team 4 Vercitti #2",
    "146": "Team 4 Vercitti #3",
    //.... Continue doing it.
    "77": "Team 8"
}

function onScriptLoad(){
    //Your addclasses.
}

function onPlayerRequestClass( player, classID, team, skin ){
    //Check the docs. Its been many days since I last touched Squirrel.
    local rawin = skin_team.rawin( skin.tostring() );
    if( rawin ){
        Announce( skin_team[ skin.tostring() ], player, 6 );
        player.SetAnim(28,231);
        PlaySound( player.UniqueWorld , 335 , player.Pos );
    }
    //This ain't needed!
    //Make sure you add all the skins to
    //the table or you'll get this announcement.
    else Announce("Select your skin, mf.",player,6);
}
// http://forum.vc-mp.org/?topic=4557.0