[Mike_Peterson]

As.. I am tired(sorry), i won't make this very hard, just simple

new vipcar;
new admincar;

//ongamemodeinit
vipcar = CreateVehicle(....);
admincar = CreateVehicle(....);

//OnPlayerEnterVehicle
if(vehicleid == vipcar && !IsPlayerVip(playerid) && ispassenger == 0) return SendClientMessage(playerid,-1,"Kiddo, this is a VIP car, go donate!");
if(vehicleid == admincar && !IsPlayerAdmin(playerid) && ispassenger == 0) return SendClientMessage(playerid,-1,"Kiddo, this is an admin car, shoo!");

dno if this works, too tired to double check it, goodluck already.