Here is the trick we bought from Microsoft customer support for $250.00

Let me know if you have any additional questions/concerns.
1. Download the MDAC version you want on the box from:
http://www.msdn.microsoft.com/data/mdac/downloads/default.aspx

2. Open the registry editor by entering the following at a command prompt:
regedit

3. Navigate to the following hive and delete the exception components:

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionSetupExceptionComponents

Note: this prevent you from overwriting MDAC is they exist therefore they need deleted.

4. navigate to the following hive HKEY_LOCAL_MACHINESOFTWAREMicrosoftDataAccess

and set the following key to the following value: FullInstallVer, RollbackVersion, and Version to 2.60

Note: when MDAC checker it will see it’s old and allow the upgrade to 2.6 SPx or higher

5. Disable anti-virus(very important), stop services such as SQL server, IIS, etc., close applications

6. Run the MDAC_typ.exe from step 1 above to install they version on the box.

7. Reboot and verify the install by running the MDAC Component checker downloadable from

http://www.msdn.microsoft.com/data/mdac/downloads/default.aspx

OR try

1. Windows operating system repair to get to the RTM release of MDAC.

2. Download the version he wanted on the box from http://msdn.microsoft.com/data/mdac/downloads/default.aspx

3. Disable Anti-virus(VERY IMPORTANT), close all applications, stop services such as SQL and IIS, then run the MDAC_tpy.exe for the version downloaded in step 2 above to install it.

4. Verify the install via the MDAC Component Checker also on http://msdn.microsoft.com/data/mdac/downloads/default.aspx

5. Apply Windows updates and hotfixes.