Steps to deploy regedt33 to a SIMATIC Comfort or Mobile panel:

• Download and unpack the .7z archive with WinCE in its name to a folder on your engineering PC.
• Run the included piimake.bat as administrator.
• Click the button labelled Create ProSave Addon.
• Start ProSave.
• Select device type, then switch to Options page.
• Find Advanced Registry Editor listed among available options.
• Remaining steps are as usual.