1. Select the location of your windows 7 installer DVD. Once the image is loaded, you will get the list of images as below

2. Now enable "Slipstream service pack" option as below

3. A new window will be opened as below in the screenshot. Select a valid service pack file and click the start button.

4. RT Seven Lite will now start the integration.

5. RT Seven Lite will finally save the progress and completes it.

6. Once its completed you can either proceed further to start customizing with service pack integrated or simply exit the application after service pack is integrated.

7. To confirm whether Service Pack is integrated properly or not, check the System Properties after windows installation as you see below screenshot