Mark:
Multi-level bill of materials (BOM) are not supported by the current versions of Adagio.
Off of the top of my head I think it may be possible to create a multi-level BOM using Crystal Reports. An overview of how this would work is to have the BOM components list as a sub-report. If the Crystal Report includes a master item (BOM) then the sub-report would be called to list the component items.
This is a report that would require a fair amount of expertise in Crystal Report to create. As your Adagio dealer we would be happy to offer our expertise. Please feel free to contact me at (604) 534-4344 extension 223.