What apps are you missing?
Do you want to go the custom ROM route, or stay with stock ROM?
If you want to stay with stock ROM, do the manual Froyo update via Kies mini, I think it adds some new apps that you thought you were missing.
Original post was for JFD tar file, you can click the link below and use JI6 to see if it adds any new apps. I bought my Vibrant in December so it already came with JI6, so I don't know what new apps were added.