Still got two (2) Que in my mind.
1. Is It possible to use command line to Delete a specific Index of SMS? if yes, How?
2. Is there available macro key for PhoneControl and If I could use this key to send thru command line?
Both things are not implemented. The only possibility you could use is to work with action=directcommand command=<command> but its really not recommened to use this possibilty for your planned actions cause you are sending commands directly to the phone. For the avaiable commands check the AT-Commandlinerefrence from SonyEricsson or the logfile of MPE.