I've been asked to look at creating a site which downloads true tone ring tones.

I more or less understand how to do this with 'traditional' ringtones, but I've been stumbling around trying to find the resources relating to this for true tones.

I gather (from this forum) I can use 'SMS Pull' or WAP, but I can't find any more detail than that.

Could someone point me to useful resources?

Thanks