I hope this link works for everyone else. Let me know...
Just in case, here's an excerpt:
Before removing the radio from the vehicle, the following procedure must be performed:
Turn on the radio unit.
Remove any CDs from the unit.
Keep radio on and depress and Hold the "SCAN" & "1" station preset buttons together. Keep buttons depressed until the radio displays "Please Wait" for 2 seconds (Figure 1). Release the buttons.
The radio will display "In Ship Mode" for 3 seconds. At this point, the radio may now be removed from the vehicle (Figure 2).
NOTE: IF THE RADIO WILL NOT ENTER SHIP MODE THERE MAY BE CDs STUCK IN THE UNIT. DO NOT ATTEMPT TO REMOVE OR DAMAGE MAY RESULT. MAKE NOTE THAT THE RADIO WILL NOT ENTER SHIP MODE ON THE 1878 FORM.
Install the Shipping Bracket into the top of the radio. The Shipping Bracket will support the CD mechanism ensuring unnecessary damage will not occur during transportation (Figure 3).
NOTE: THE SHIPPING BRACKET SHOULD EASILY SLIP INTO THE RADIO. DAMAGE WILL RESULT IF THE SHIPPING BRACKET IS FORCED INTO THE RADIO. MAKE NOTE THAT THE SHIPPING BRACKET COULD NOT BE INSTALLED INTO THE RADIO ON THE 1878 FORM.