how can i group parts like zbrush does with its poygroups ,and still be in the same object group in 3d coat. instead of making separate objects. so i can work on seperate parts of the specific object and wont have to change level groups all the time. would save lots of time if i didnt have to keep changing objects. also the parts would then be one object but able to select different separate parts on that object. i could also place a certain part of an object into a different object layer.