SMS Gateway

We have an xml api from a Mobil Operator in Turkiye. We want to open a SMS web site which our customers 'll send sms and mms. there are 2 section in the site. 1-Admin Area 2-Customer Area ------------------------- 2-CUSTOMER AREA ------------------------- a)Quick SMS : When click this section, only entering the phone number wrting sms and click to send button. b)Group SMS : They 'll choose the groups and than sende them SMS c)Address Book : In there, they 'll be add new groups/delete groups/edit groups, than they 'll add the names and telephone nembers into this groups. d)Buying SMS Coin : they 'll make payment with credit card and buy sms coins.( Eg:1SMS Coin = 1SMS) For the other optins we want to talk on MSN.