Help! Data lost on external hard drive.

Well, I will explain what I did first.
I have an external hard drive. It has 4 FAT32 partitions, the 1st and 3rd ones are empty, the 2nd and 4th ones has about 10G data on each. I wanted to make a minimum backup of the current Tiger system with Superduper! to partition (or volume) 1. So I moved all my photos, musics and documents out from the internal hard drive to the 4th partition on the external hard drive. Then, I deleted all the original files on the internal hard drive, and emptied the Trash, sign... And then, I tried to use Superduper! to make a backup of the only volume on the internal hard drive. I chose the method of "volume to volume". I forgot I have another option to just make a backup image of this volume. I guess if I did that, it would save me all the trouble that I have right now. Anyway, after I hit "copy now", Superduper! tells me that I have to use a volume that has a format of Mac OS Extended in order to do that. So I used the disk utility to convert the 1st FAT32 partition to Mac OS extended format as suggested by Superduper!. I think the disk utility told me that this operation would deleted everything on that volume, however, it won't affect the other 3 volumes. Since it is empty, I proceeded. However, it ended up with an error. I forget what it said now. The result is that all the four volumes are not accessible to either mac or windows OS. I successfully retrieved all the files on partition 2 of that external hard drive to another disk with EasyRecovery Pro. They all seem good. I tried the same thing on partition 4. I do get all the files that are moved there long time ago using windows. However, only a few files that are just moved to it from the internal hard drive using Mac OS Tiger right before the disaster were retrieved with success. All the others including my iPhoto and iTune Library are nowhere to be found now.
I tried Data Rescue II (for mac) on my internal hard drive hoping that it might find the files that I deleted, however, I think running the Tiger OS itself may have changed the information on the disk already, so it doesn't really give me the files I wanted. Maybe it did find most of them, but they are not grouped in a folder like what they were before. Anyway, I think I have a better change with the external hard drive since it is not even accessible without a software that is dedicated to recover files.
Right now, I am out of ideas. Please tell me what I can do to get those missing files back. Any suggestion is welcome. Thank you!

"Stellar Phoenix Macintosh - Mac data recovery software, recovers data from damaged, deleted, or corrupted volumes and even from initialized disks."
They have a trial version, so I guess you can see if your data can be recovered...
http://www.stellarinfo.com/mac-data-recovery.htm
"Data Rescue II is the best data recovery software on the market for recovering files from a problem hard drive. Data Rescue II works when other tools fail. Data Rescue II is also completely safe to use since it does not attempt any risky repairs to the drive while its scanning."
http://www.prosofteng.com/products/data_rescue.php
FileSalvage is an extremely powerful Macintosh application for exploring and recovering deleted files from a drive or volume. FileSalvage is designed to restore files that have:
* been accidentally deleted.
* become unreadable due to media faults.
* been stored on a drive before it was re-initialized/formatted.
http://subrosasoft.com/OSXSoftware/index.php?mainpage=product_info&productsid=1
Entering:
mac data recovery
into Google will list some firms who specialize in recovering data. Data recovery isn't cheap.
Robert

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Hello, Esmin77.
Thank you for visiting Apple Support Communities.
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Help! Data lost on external hard drive.

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