The custom pack is used to initalize the phone and for using a particular language.. So if you use english then almost all custom packs can be used. Use a custom pack that matches your firmware version.
what do you mean by saiyng "that matches your firmware"? i have given a status of my phone of xs++ above...plz have a look and tell me an e.x.
and smthg else: in xs++ which file of the cust pack we choose as customization? the whole file .zip?