header() & session problem...

hello, let me try to explain my problem.. i have one script in which i set some stuff like sessions and some cookies... now i need to call this script from almost every page on my site somehow like lets say i'm on page www.url.com/script.php?page=14 and then i call that other function Header("Location: /scripts/setvars.php?var1=foo&far2=foo2"); here's now the real problem..what should i put in setvars.php scripts so it returns to the page i called it from ? basicly i need to get back to script.php?page=14 ... can anyone help me if anyone knows any better way i'll be glad to listen one more thing, i cant use include(setvars.php) couze i need to refresh ... so i can use cookies right away and one more question bout sessions..when i set session like session_register("foo"); do i need to refresh the page before i can use it like $HTTP_SESSION_VARS["foo"] or can i use it right away ? (couze first way doesnt work for me( i need to refresh ), maybe i'm doin something wrong, so i would like some help on this too) thx in advance