I made a matching skin for iDrive SE. Right now I'm using Cranium to test and using all your files and graphics.
I didn't quite understand what you explained above so let me tell you what i did:
1. copied the folder "tags" to the RR folder so it's like this c:\program files\roadrunner\tags
2. Ran the .bat file to register the .dll and it said successful
3. Copied every thing inside the "add to skin" folder (except add to exectbl.ini) to the cranium skin folder.
4. Opened the file "add to exectbl.ini" in notepad and copied the content to the end RoadRunner's ExecTBL.ini
5. Created a button in cranium with "MENU;tag_editor.skin" command.
When i press the button, the editor screen (which matches polaris) comes up; i select a tag to edit and the cranium OSK pops-up; I type something in and then hit "enter", the "writing new info" sign pop-up - here is where things are not working right - When the sign goes away, it goes right back to the audio player and i DON'T see any changes. In the video, it stays in the editor screen and the changes happen right-then.
How to make it stay in the editor screen until i exit manually is the question.
Polaris is a great skin, just not in my color scheme - let me have it in red and an option to change the logo and it would be a winner. I like Elco much better; are you done revamping it yet? I can test it for you