How to report old scores with GameKit?

I'm thinking of adding GameKit support to my iOS game, and I'd like to still give credit to players for the high scores 开发者_运维技巧they got before I added GameKit. I noticed that the date property of GKScore is readonly, and it seems to be automatically set to the current date and time. Is there a way I can report old scores to GameKit's leaderboards, including the old timestamps?

My conclusion is that there is currently (as of iOS 4.3.3) no Apple-sanctioned way to do this.

I think I could do some casting sourcery (oh what a pun!) on GKScore to force in the timestamp I want, but I'm afraid Apple might reject the app. My plan is to simply drop old scores once I add GameKit support.