If you're running NTLite, there's no practical reason to install Windows ADK, or use WSIM. Most of the same functionality that's provided in both products can be done natively in NTLite.
The major difference is WSIM allows to you add pre-/mid-/post-Setup tasks, but it does them through Unattended XML run commands.
But if you still prefer to use WSIM, follow this strategy:
- Edit your boot & install images using NTLite, to add Updates and Features, remove components, and change Settings.
- Provided the modded images to WSIM. Allow WSIM to manage the other aspects of scripting or Post-Setup tasks.
Mixing & matching between NTLite and WSIM for Post-Setup tasks is not advised. WSIM is better if you need custom scripts to run the middle of deployment, usually if you have some dynamic provisioning step that needs to be scripted.