CLICKATELL SMS API INTEGRATION

I already have a website. I want to Inegrate Clickatell SMS API into my existing site: The project features are: This will be a web-based solution to send SMS, Logos and Ringtones using the Internet. My subscribers would be able to login to the application and depending on the balance in their account, should be able to send SMS, Logos and Ringtones Users should also be able to personalize from id: Number or Name I should have the possibility, as admin, to suspend, reactivate... accounts Accounts with some criteria should suspend automatically If no balance the sending stops When first signup an automatic balance is attributed Additional features should be added in a next project related to this one Additionally the application will provide Administration Web Interface to enter/modify the data of content (Logo and Ringtones). It will Includes contact/address book functionality Upload contacts via spreadsheet Personalize sender ID the website i will use for this service is [login to view URL] . All files concerning this website must be in this website. Users should not see another address but [login to view URL] I already have account with clickatell they already have an SMS API which can be integrate into my existing site. Here is the link to the API [login to view URL]