Rollback/uninstall MSI from 4.0 to 3.1

I upgraded my MSI installer to version 4.5, and now I need to go back to 3 and dont know how.

Can someone help me figure out how to uninstall or rollback the version?
WilliyWhippingBoyAsked:
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rindiCommented:
Check inside the control Panel, "Add/Remove Programs" and uninstall it through that (you may have to enable "Show Updates" so the windows updates are visible.
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WilliyWhippingBoyAuthor Commented:
Not in add/remove programs. The two Microsoft support reps I talked to told me it was "above their level of expertise" and sent me to the pay site. I really need to figure this out.

I tried this method below, but it didn't work for two reasons. The install program wont install MSI in safe mode, and I cant extract the installer to replace the files.

: Method 2: Reinstall Windows Installer
To reinstall Windows Installer, follow these steps:

   1. Start your computer in Safe Mode. To do this, follow these steps:
         1. Restart your computer.
         2. Press F8 after you receive the following message:
            Please select the operating system to start
         3. On the Windows Advanced Option menu, use the arrow keys to select Safe Mode, and then press ENTER.
         4. If you use a dual-boot computer or a multiple-boot computer, select the appropriate operating system from the list that is displayed, and then press ENTER.
         5. Log on to the computer.
   2. Click Start, click Run, type cmd, and then click OK.
   3. At the command prompt, type attrib -r -s -h %Windir%\System32\dllcache.

      Note On a Windows 98-based computer, type System instead of System32.

      Note On a Windows Server 2003 SP1-based computer, skip this step. Instead, go to step 4.
   4. At the command prompt, type CD %Windir%\System32, and then press ENTER.
   5. At the command prompt, type the following lines, pressing ENTER after each line:
      ren msi.dll msi.old
      ren msiexec.exe msiexec.old
      ren msihnd.dll msihnd.old
   6. At the command prompt, type exit, and then press ENTER.
   7. Restart your computer in Safe Mode.
   8. Update the Windows Installer files on the hard disk to the latest version.

      Note On a Windows Server 2003 SP1-based computer, extract the files in the Windows Installer 3.1 redistributable package, and then copy the following files to the %Windir%\System 32 folder on the computer:
          * Msi.dll
          * Msiexec.exe
          * Msihnd.dll
   9. Restart your computer in standard mode.
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rindiCommented:
Try your above instructions until and including point 5. Then reboot and just try installing the installer in standard mode.
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WilliyWhippingBoyAuthor Commented:
It somehow re-creates all the renamed files. So when I run setup I get this: Setup has detected that the service pack version of this system is newer than the update you are applying. There is no need to install this update. Aaggggghhh! !
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rindiCommented:
Try running the installer with /? at the end, this might show you the options of the installer (possibly how you can unpack the files only, without installing).
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WilliyWhippingBoyAuthor Commented:
I tried the /overwriteoem but haven't tried the /integrate (should that be c:\windows\system32 ?)
ca.jpg
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rindiCommented:
Most probably.
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WilliyWhippingBoyAuthor Commented:
It looks like I have to uninstall sp2. Can someone tell me how to uninstall sp2 from server 2003?
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WilliyWhippingBoyAuthor Commented:
NM. found it
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WilliyWhippingBoyAuthor Commented:
Had to completely re-install the OS.
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Windows Server 2003

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