attachments in xsi

[crackhead]

im making a driveable vehicle. i have to make the main bone thing for the car which is called car.body and i have to make attachments that are liek subcatagorys under car.body for the wheels and stuff. i have no idea how to make these attachments within a bone. i dont think its actualy a bone i guess they are joints. would it matter if these wernt within the car body?

 

[thereisaspoon]

create->null

 

[crackhead]

yeh i can do get>primative>null but like i need them to be within a null. like ot have the main null and then the little nulls inside it when u click it in scene if u see what i meen.