[TC_Halogen]

While it might not be possible to save the actual visual of the replay, you can save the replay code on the Velocity engine.

Play your song, and once you get your desired result, press the key that you have mapped for "Menu" in your settings, click Replay, and the click the Copy button for the song that you want.

Copy this code to a text document, save it, and you can load it whenever you want by pasting it into the dialog box you see when you go back to the Replay menu.

EDIT: You would ninja me.