Heiarchy problems during 'split part' mode effecting other parts

Hey all,I have been cruising through my plane design and suddenly when creating/cutting gear bays, then gear doors, I am suddenly having problems with other parts clinging to them as their high heiarchy parts tree placement order?~!@#$I once read here that you could go into somewhere here in windows notepad or notebook and see the heiarchy layout and change it. I am also wondering if it is possible that I am doing something wrong. Is there a way the professionals do it when they are creating a plane, in which perhaps they never assign parts a heiarchy yet until finishing the job?I also havent figured out how to work the heiarchy button on FSDS2. Perhaps I should have that 'on' when cutting out parts or joining a gear bay to a fuselage in order to connect the poly's and blend it into the fuselage's belly panels/poly's.I would be grateful for some advice from the master design guru's.Take care all and thanks tremendously for all your past help.Bill