- Open the step.rc file for the theme.
- Take a look at what modules are being loaded.
- Read the docs for each module to see what it does
- If the module displays graphics or text on the screen read the doc more to find the !bang command to hide the graphic or text
- Gather all the bangs necessary to hide all the elements of theme and put it into a script like Mr_Goat demonstated above. This particular script requires you to include mzscript.dll in the theme.
- Don't forget to create a similar script to "show" all the graphics again :)

Let us know if it's still not clear.