Repartition portable hard drive without erasing contents

Hey all,
So recently I accidentally formatted my portable hard drive but luckily I was able to get my files back thanks to this incredibly useful free software called TestDisk (figured I'd give it a plug lol). Anyway, I don't think I recovered the data properly because now my portable hard drive has only one partition which is in Fat32 format. Anyway, I was wondering if anyone knew a way to repartition my hard drive so that I could leave the existing partition but create another one without having to format the whole thing.
Thanks heaps,
djnush

How is the drive partitioned currently - GUID or APM? It is possible to create a second partition without completely erasing the drive, but it depends on how the drive is currently partitioned. And, you need to be running 10.5.8 in order to do it on a GUID partitioned drive. However, if the drive is currently partitioned using MBR or APM, then you cannot do it on the fly. You would have to repartition the entire drive thus erasing any data on the drive.

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