1) /script UseSoulstone()
2) See http://www.wowwiki.com/API_AcceptBattlefieldPort for usage.
3) /script RepopMe()
4) This is much too complicated to do in a macro. See http://www.wowwiki.com/World_of_Warc...Raid_Functions .

Reply I got from the wow forums, RePopMe() and UseSoulstone() are right what I was after.