There is a bug when recompressing install.wim files with vLite. vLite extends the EditionID Flag (/FLAGS "EditionID" parameter for imagex.exe) of the resulting install.wim with the string "(vLite)" - which makes these files work for every deployment option except for making an unattended cd/dvd.
If you want to use the install.wim with the setup on a DVD you have to adhere to some standards set by Microsoft vor the EditionID:
Specifies the version of Windows you are about to capture. The /flags value is required if you are going to re-deploy a custom Install.wim with Windows Setup. The straight quotation marks are required. This flag is not required if you deploy the image by using ImageX. Valid EditionID values include:
For the moment I help myself with a hex-editor and changing the stuff back to what I need in the install.wim, but it get's tedious if you have to do it over and over again.
Maybe you could implemt an option to make DVD-Installer compatible files in the next version.