How to use more of the parameters in the SMPP spec

Hi,

I'm trying to get more of the useful SMPP parameters to work.

Such as how to set per SMS via a http URL the SUBMIT_SM mandatory parameters
of the priority_flag, esm_class and the optional parameter of the
user_message_reference?

How do you receive back from the SUBMIT_SMS_RESP the command_status which
indicates the success or failure of SMPP request?

How do you extract from the DELIVER_SM the optional parameters the
user_message_reference,network_error_code and the message_state?

Then place these value directly into mysql?

Any ideas will be appreciated.

Thanks