i finally got player prefs to work, but unity insists that there is a problem, actually three. I made it so it saves the value of a variable, gold. it works, but it says a bunch of wierd problems. Heres the script with the gold variable:

function Start()
{
    if(!PlayerPrefs.HasKey("Gold"))
    {
        static var gold : int = 0;
        PrefsScript.saveIntPref("Gold",gold);
    }
    else
    {
        PrefsScript.loadIntPref("Gold",gold);
    }
}

function OnGUI()
{
    GUI.Label(Rect(1300,20,100,50), "Gold: " + PlayerPrefs.GetInt("Gold"));
    if (GUI.Button(Rect(5,80,80,50), "Pause"))
    {

        if(Time.timeScale > 0)
        {
            Time.timeScale = 0;
        }   
        else
        {
            Time.timeScale = 1;
        }
    }
    if (GUI.Button(Rect(5,15,80,50), "Main Menu"))
    {
        Application.LoadLevel(0);
    }
}
function Update()
{
    PrefsScript.saveIntPref("Gold",gold);
}

and here's the script with the PlayerPrefs functions:

static function saveIntPref(key,variable)
{
    PlayerPrefs.SetInt(key,variable);
}
static function loadIntPref(key,variable)
{
    variable = PlayerPrefs.GetInt(key);
}
static function saveFloatPref(key,variable)
{
    PlayerPrefs.SetFloat(key,variable);
}
static function loadFloatPref(key,variable)
{
    variable = PlayerPrefs.GetFloat(key);
}
static function saveStringPref(key,variable)
{
    PlayerPrefs.SetString(key,variable);
}
static function loadStringPref(key,variable)
{
    variable = PlayerPrefs.GetString(key);
}
static function killPref(key)
{
    PlayerPrefs.DeleteKey(key);
}