I'm using 7dana-soft on my site. Here is what I did:
1. Upload 7dana-soft (or other) theme to /xoops/themes/. ( I didn't check the CH-MOD permissions.)
2. Go to System Admin -> Preferences, and make sure Update module template .html files from themes/your theme/templates directory? is set to "Yes".
3. Set your default theme to 7dana-soft.
4. Update every module under System Admin -> Modules.
5. Voila!
This is only what I did and it seemed to work fine. See it here.