If you did a "Save All" on the last step then you will need to get back to editing the workout. You would first select "Manage Workouts" from the main menu, then click on the arrow to the right of "Calisthenics".
At this point you should be comfortable enough with the editing done to add the pushups, that you can add the same set of exercises again, this time using the name "Incline Pike Pushups" anywhere "Pushups" was used before.
If you want to give that a try then stop reading here!
If you figured out that you could do it by simply selecting the "Pushups" line from the calisthenics workout screen, using Edit | Copy and Edit | Paste, and renaming the pieces then you deserve some extra credit!
Then it would be a good time to Edit | Save All.