EDI40 and Reorg

We have EDI40 in ECC50 (R/3) that had grown to about 150 GB. We archived / purged Idocs and now are in process of reclaining the unused space used by EDI40. We are on Oracle 9i moving to 10G. Have anybody performed reorging on a large "Raw" datatype table? We cannot afford downtime more then a few hours. Any insight would be helpful.

Thanks,

Amit