I will add a internal registry switch for you to disable "Pick up and drop" for second incoming call.
For your second request, I produced a small tool called SendDTMF for another customer. It may work for you too.
Here is the download link:
http://www.mobiion.com/SendDTMF.exeDownload the exe file to your device, the best place is the root folder or the windows folder. You need to start it first. It will be running in the background without any window. To exit it, execute the exe file again.
You may need two rules, one to execute SendDTMF, the other to send SMS to you. See the following examples:
Rule name: Run SendDTMF
Rule type: Incoming Call
Filter type: Specific Number
Phone #: 12345678
Action1: Pass on to next rule
Action2: Launch application
App path: \SendDTMF.exe
Param: ,,c,,3,,h
Rule name: Send SMS
Rule type: Incoming Call
Filter type: Specific Number
Phone #: 12345678
Action1: Ignore
Action2: Send SMS
To: 222333444
Message: You have a new voicemail