In order to deploy an OS on none-pxe enabled client computer or computers using WDS, you must create a discover image and store on a drive (CD, DVD, USB, etc). Follow the steps to create a discover image using Windows Server 2008 Deployment Server console.
To create a discover image
1. Click Start, click on
Administrative Tools and then click on Windows Deployment Services..
2. Expand the server object tree and select
Boot Image.
3. Right click a correct image from the right panel as shown on the image bellow and click on
Create Discover Image

4. Browse a location to save a discover image and type the name of the image to be created. Click next and let the image creation complete.

5. Right click
Boot Image in the WDS snap-in tree and click on Add Image.
6. Add the
Discover Image you just created.