I've tried this on a forza 3 save i have on the old hd that's from my banned xbox. Created a new profile on the hd and saved it. Loaded it and saved the id's. Open the file from the old savegame and loaded id's and resigned them.
Then i only get my profile doesn't exist any more.
If i try another way with Le Fluffie and PackageYiff, i get my profile has been tampered with. Is there no way to get my old save working on the new hd
Edit 1::
It works when you delete the other files you have, like replay, pics, photos..