Well, about all you can do on the replay (4000/4500, anyway) is change the name of the show (the name of the episode, pretty much). Just find the show in the replay guide, hit select, then choose "Rename Show"
If you export it to your PC with DVArchive, you can change pretty much anything you want.
If you export it to your PC with DVArchive, you can change pretty much anything you want.