When I change the "Screen Name" in Google Voice setting, and then use "SMS through GV" to a number, it automatically resets the screen name to my registered phone number (callback number - not my GV number). Can I have an arbitrary screen name in text to display in "Conversation" threads?

Also, the thread in "Conversations" (using SMS through GV) doesn't recognize my avatar (already set for my own contact - myself). It shows a blank contact (default blue icon).