4 of 5 Removed unnecessary thanks

hierarchical input and display design

Possible Duplicate:
What's the best way to view a deep hierarchy?

In my application, I need to design hierarchy of product.

i.e. Parent group, group, parts, subparts etc. ( add, remove , edit )

What should be the ideal way to do it in single page ? ( Tree comes to my mind but it is too vertical, my primary users will have wide screen monitors. )