Problem on Profit Center Group Heirarchy

Hi,

I have a problem regarding profit center group heirarchy. The situation is like this: I have the highest parent node which is the Group Name then its first child in the tree is the persons responsible then next is the companies under him/her and then the projects under the companies.. Now i have a program that generates income stmt depending on how the user filters it's data from FAGLFLEXA table using profit center field.. the filtering shud be like this:

Select-options: Group Name,

Person Responsible,

Companies,

Projects.

my problem is i dont know where i cud get the all those fields. I wonder if anyone cud help. THnx.

And also i want to filter the data selected by the user in select-options like for example if the user chooses

Group name, the next select-options which is person responsible shud depend on the Group name selected and that follows with the next select-options. Thnx in advance