... Using Any User Table

Create a new table named e.g.:"tblRibbons" with following fields:

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

In a standard module create the new function "LoadRibbons":

Public Function LoadRibbons()
'Load ribbons into the database
On Error GoTo Error1
Dim db As DAO.Database
Set db = Application.CurrentDb
Dim rs As DAO.Recordset
Set rs = db.OpenRecordset("tblRibbon")
' tblRibbon has to be replaced by your table name. 
    Do Until rs.EOF
        Application.LoadCustomUI _
        rs("RibbonName").Value, rs("RibbonXML").Value
        rs.MoveNext
    Loop
Error1_Exit:
    On Error Resume Next
    rs.Close
    Set rs = Nothing
    Set db = Nothing
    Exit Function
Error1:
    Select Case Err
        Case 32609
        ' Ribbon already loaded
    Case Else
        MsgBox "Error: " & Err.Number & vbCrLf & _
               Err.description, vbCritical, _
               "Error", Err.HelpFile, Err.HelpContext
    End Select
    Resume Error1_Exit
End Function

Create a macro named "AutoExec" which will be run when you open the database:

Re-start the database.

Assign the ribbon for this database:

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

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