1) Select a song
2) Press the [FUNCTION] button
3) Press the [F] 'DIGITAL RECORDING MENU' button
4) Press the [A] 'SONG CREATOR' button.
5) Use the [TAB] button to select the SYSEX tab
6) Use the [1, 2, 3 UP/DOWN] buttons to select the BAR:BEAT:CLOCK at which the tempo change will occur.
7) Press the [6 DOWN] button to "Insert" a tempo change.
8) Use the [A-E] buttons to navigate the display and highlight the tempo value.
9) Use the [DATA] wheel to adjust the tempo value to the desired Tempo and press the [ENTER] button.
10) Repeat steps (1-9) for additional tempo changes.
11) Press the [I] 'SAVE' button to save your changes.
Additional details can be found on pages 165-166 in the CVP-409/407 Owner's Manual.