Microsoft has launched an new article around this . See my previous posts regarding MDT2008 (http://scug.be/blogs/sccm/archive/2008/05/17/installing-osd-deployment-with-mdt-2008-and-get-an-error-in-sms-provider-log-during-mdt-ts-import-custom-boot-image.aspx)
See http://support.microsoft.com/kb/950782/en-us for the full article
To replace Windows AIK version 1.0 with Windows AIK version 1.1, follow these steps:
1. Uninstall Windows AIK 1.0 by using the Add or Remove Programs feature in Control Panel, and then restart the operating system.
2. Install the latest version of Windows AIK. For example, use the Waikx86.msi installation file.
3. Export the boot images from Windows AIK. To do this, follow these steps:
a. Click Start, click Run, type Wbemtest.exe in the Open box, and then click OK.
b. Click Connect.
c. In the Namespace field, type root\sms\site_site code, and then click Connect.
d. Click Execute Method.
e. In the Object Path field, type SMS_BootImagePackage, and then click OK.
f. In the Method field, select ExportDefaultBootImage, and then click Edit In Parameters.
g. Under the Properties field, click to select the Architecture check box, and then click Edit Property.
h. Next to the Value field, click to select the Not NULL check box, type x86 or x64 under the Value field, and then click Save Property.
i. Under the Properties field, click to select the ExportImagePath check box, and then click Edit Property.
j. Next to the Value field, click to select the Not NULL check box, type the path of the image under the Value field, and then click Save Property.
k. Under the Properties field, click to select the ImageIndex check box, and then click Edit Property.
l. Next to the Value field, click to select the Not NULL check box, type 1 under the Value field, and then click Save Property.
m. Click Save Object.
n. Click Execute. After some time, a dialog box that indicates success appears.
4. In the Configuration Manager console, import the image to System Center Configuration Manager. To do this, follow these steps:
a. Under System Center Configuration Manager in the Configuration Manager console, expand Computer Management, expand Operating System Deployment, expand Boot Images, and then click Add Boot Image on the Actions pane.
b. Supply the location and the name of the new boot image that you specified in step 3j for the ExportImagePath value, and then follow the instructions in the wizard to add the boot image.
5. Verify the version of Windows AIK. To do this, follow these steps:
a. Click Start, point to All Programs, point to Microsoft Windows AIK, and then click Windows System Image Manager.
b. Click Help, and then click About.The build number for Windows AIK version 1.1 is 6.0.6001.18000.
Kenny Buntinx
Read the complete post at http://scug.be/blogs/sccm/archive/2008/07/03/how-to-replace-windows-aik-version-1-0-with-windows-aik-version-1-1-when-you-use-system-center-configuration-manager-2007.aspx