Import will no wipe your other stuff. Just adds them.
The slider depends on your theme option settings and particularly whether you choose to use posts or features in your slider.
1. Make sure you have no widgets in the slider area (First Home Page Area in Widgets)
2. Make sure in theme options the slider is set to show “features”
2. Create a “feature”.
3. Make sure the feature has a “feature image” – this is a standard WP thing – bottom right of edit page
As long as you have one feature with a feature image the slider will show up.
I did all that you said in your reply #4155. I used a slider in the MU there. Just purchased Lush. Using the same Featured images in the posts. Can get slider working. Do I have to put a slider widget or anything in the First Homepage area?