Can you please run your brain.exe in /high or /realtime mode?
You must make a tool for edit TQuest.mpq, or use sh.t from 4story called TQuestEditor (:O)
You will need a table TQOBJECTIVECHART or something like or unlikely that.
If you make a table with same structure of that, you will edit quests and add them, but the others quest will not show objectives,so, useless