... Using The System Table USysRibbons

Make sure that "system objects" are visible. To show them click with the right mouse button on the title of "navigation pane" and select "navigation options...". You can also activate the options by "Office Menu" / "Access Options" / "Current Database" / "Navigation" / button "Navigation options".

Tick the checkbox "System objects" in "Display options".

Create a new table called "USysRibbons" with following fields:

Enter a unique "RibbonName" and the appropriate XML in field "RibbonXML".

Assign the ribbon for this database:

"Office Button" / "Access-Options" / "Current Database" / "Ribbon and Toolbar Options" / "Ribbon Name:" select the ribbon that should be loaded when you open the database.

After re-start of the database your ribbon will be displayed.