Be default the capture process in MDT 2013 uses ImageX to capture the image, there is nothing wrong with that, well, it takes time since Imagex takes about 15 minutes or more just to scan the file system before it starts to capture the image and maybe you would like to get rid of that time. That is possible by doing some modification to one of the scripts in MDT so that it starts to use DISM.exe instead
The script that needs to be modified is ZTIBackup.wsf and you can download the updated version here. (Please make sure you have a copy of the previous version so that you can go back for any reason.)
(Important note: I have updated the script since I missed to include settings that will honor the wimscript.ini file, without that the image will not be cleanup from junk and therefore larger. So, if you did download the script and used it, download it once more, since it is now updated)
As a bonus this also fixes the problem to append the wim file to an existing wim file.
- Download the file from here: http://1drv.ms/1gZICln
- Rename the Scripts\ZTIBackup.wsf to ZTIBackup.old
- Clear the Internet download flag from the new ZTIBackup.wsf.
- Copy the new ZTIBackup.wsf to the Scripts folder.