OK - I had played with this feature for about a month and it looks good so...
Create a text file named 'Design-Script.dbg' in the eHome folder.
Now when the eHome client is running you will have 2 new buttons at the top of the client screen.
These will give you 2 options:
Edit your EH Client VBSript file
Run the screen designer for the screen your viewing.
The updates from them are processed in real time. Use this to fine tune your HA screens. When done just delete the text file.

