pay sistem with sms HOW

Hi to all, i want to add a payment sistem by sms. For do this i need to creat a new table for database, and to modify the checkout page...

By default Dolphin have paypall mod .. is possible to add a new one ? And how?

What i need is :

1 at the page i need to show a message with the telefon number and the total price.

2- the member send a message, and obtain one reply with one code(this part is made by the company give me the payment by sms), that have to insert into a field on my site

3- the program have to check if the code is true (from the site database)

4- if is correct have to change the membership level..

I hope is is possible to do..., but how. Can ypu help me :? 

Hi, i use 123tickes for do this... you have just to modify one file for change the membership level..