I need to Downgrade my iPhone 3G from iOS 4.0 back to 3.1.3

Question

I've had the same problem as many iPhone customers, updating iTunes to newest version (9.2.0.61) and Upgrading my iPhone 3G to v. 4.0 from v 3.1.3.
iTunes successfully upgraded to iOS 4.0, but the Restore of my backup FAILED!!! OVER and OVER and OVER and OVER and OVER and OVER Again! I know for a fact that I tried to Restore my Backups from: AppData\Roaming\Apple Computer\MobileSync\Backup folder. At one time I had 14 backups and each 1 was 3.55GB. This is kind of interesting, because after my last backup just before the iOS 4.0 Upgrade, the backup was 3.55GB. After each failed Restore and then another backup,etc. *+each and every backup was 3.55GB+*.
Each time (over 25) I have to do a hard restart(see the USB Logo), install iOS 4.0 > Restore, which the progress bar goes about a quarter of an inch and then loops over and over, trying to Restore my phone. Just an attempted Restore takes at least 45 minutes! The time of any of the Restores I've tried, which are many and all take the same amount of time and are all 3.55GB.
I can't tell you how many migraines I've had over this B.S. or how many hours over the last 3+ weeks I've been trying to get my data back. I don't care about the pictures or the applications, cuz I can always get them. It's all the IMPORTANT Data I can't get back that I desperately NEED. OK, I'll quit complaining. Sorry! I had to get it off my chest. ;^\
I spent weeks on the phone with 2 different *+Apple Senior Advisor's+*, who in turn submitted a number of Tickets to the *+Apple Engineers+*.
After a few weeks of phone calls back and forth, I've spent untold hours off the phone trying to get my NOTES, CALENDER, CONTACTS, and AUDIO RECORDINGS, I've saved for the last 2 years, without any good results.
The last reply from an Apple Engineer, was to try something I had already tried and the other answer was to *+TRY 3rd. Party Apps & Suggestions+*.
OK, one of the things I did was to download some files, such as:
1) iPhone1,23.1.3_7E18Restore.ipsw (Apple Device Software Update File)
2) iRecovery Application (.exe)
3) libusb0.dll
4) libusb-win32-filter-bin-0/1/12/2
when I installed either 3 or 4, my PC started acting weird, so I restarted my PC and got the BSOD. I restarted my PC in Safe Mode and uninstalled libusb..., restarted my PC and I was back in business. I haven't tried anything since and need step by step HELP. PLEASE, PLEASE, PLEASE!
I have a comprehension disability, which makes it difficult at best to get much accomplished on my own.
5) redline5.dll Windows Batch File
6) EnterRecov Windows Batch File
7) exitrecovery.commandlist COMMANDLIST File
8) IPHUCWIN32 Application
9) RecBoot Application
Now I have these 9 things to work with and will download anything else I need.
Thanks in advance ;^)

Answer 1

I updating iTunes to newest version (9.2.0.61) and Upgraded my iPhone 3G to v. 4.0 from v 3.1.3. Now my iPhone won't Restore from my backups.
iTunes successfully upgraded my iPhone 3G to iOS 4.0, but the Restore of my backup FAILED, OVER and OVER Again! I tried to Restore my Backups from: AppData\Roaming\Apple Computer\MobileSync\Backup folder. At one time I had 14 backups and each 1 was 3.55GB. This is kind of interesting, because after my last backup, just before the iOS 4.0 Upgrade, the backup was 3.55GB. Each and every backup was 3.55GB
Each time (over 25) before I could do another attempt to Restore, I would need to reinstall the iOS 4 (see the USB data cord & iTunes Logo). During Restore, which the progress bar goes about a quarter of an inch and then loops over and over, trying to Restore my phone. Just an attempted Restore takes at least 45 minutes! The time of any of the Restores I've tried, which are many and all take the same amount of time and are all 3.55GB. Go figure!
I can't tell you how many migraines I've had over this B.S. or how many hours over the last 3+ weeks I've been trying to get my data back. I don't care about the pictures or the applications, cuz I can always get them. It's all the IMPORTANT Data I can't get back that I desperately NEED. OK, I'll quit complaining. Sorry! I had to get it off my chest. ;^\
I spent weeks on the phone with 2 different Apple Senior Advisor's, who in turn submitted a number of Tickets to the Apple Engineers.
After a few weeks of phone calls back and forth, I've spent untold hours off the phone trying to get my NOTES, CALENDER, CONTACTS, and AUDIO RECORDINGS, I've saved for the last 2 years, without any good results.
The last reply from an Apple Engineer, was to try something I had already tried and the other answer was to TRY 3rd. Party Apps & Suggestions.
OK, one of the things I did was to download some files, such as:
1) iPhone1,23.1.3_7E18Restore.ipsw (Apple Device Software Update File)
2) iRecovery Application (.exe)
3) libusb0.dll
4) libusb-win32-filter-bin-0/1/12/2
when I installed either 3 or 4, my PC started acting weird, so I restarted my PC and got the BSOD. I restarted my PC in Safe Mode and uninstalled libusb... I restarted my PC and I was back in business. I haven't tried anything since and need step by step HELP. PLEASE, PLEASE, PLEASE!
I have a comprehension disability, which makes it difficult at best to get much accomplished on my own.
5) redline5.dll Windows Batch File
6) EnterRecov Windows Batch File
7) exitrecovery.commandlist COMMANDLIST File
8) IPHUCWIN32 Application
9) RecBoot Application
Now I have these 9 things to work with and will download anything else I need, but I need to know what to do with the ones I really need and in the proper order.
Thanks in advance ;^)