RKS,
Most data in SCM is not stored in tables, it is stored in LC. In general, it is not the best idea to use APO for creating custom reports against transactional data. You do such reporting in the OLTP, and you use the standard SAP programs to keep these systems in synch.
Some SD auxiliary data is sometimes stored in /SAPAPO/SD_DOC.and /SAPAPO/SDFIELD. Check here, you might find something useful. No guarantees......
Best regards,
DB49