S5 Previews for WowLights Christmas and Halloween sequences can be downloaded at the links below:

Christmas:
Standard Layouts (16-64 Outputs)
Deluxe Layouts (80-128 Outputs)
RGB Layouts (64RGB & 128RGB)

Halloween:
Halloween Layouts (16, 32, 32RGB)

After Downloading and installing the preview open the Light-O-Rama Sequencer and in the previews section click the Import/Export button (picture of window with left arrow) and click Import Preview. Open the preview and click Save.

Then when opening a sequence select "Use an existing preview", use the drop down to select the preview, click OK, make sure "Select all tracks/grid views" is checked and click OK. Then click File > Save to save the sequence with the preview attached.