You don't say what software you're using to edit the pictures. If you have bought a Sandisk Extreme III card recently, you might have got a copy of Capture One RAW converter. This can do batch processing. But surely you can weed your 900 images down to, say, fifty or so? No newly-weds will expect to see a vast number of almost identical images. Pick out the best and concentrate on them. If the couple ask about other people or other pictures, you can always go back and select a few extra.