Hello,
This is a basic tut on how to convert pc gamesaves to 360.

1. Open up modio
2. Open a save which you will swap for your pc gamesave
3. Click on file contents and right click the save game data click on replace file
4. Find your pc save and click open
5. Rehash and Resign
6. Open your device and place the save youve just rehashed and resigned into the fallout folder

This should work if youve followed the tut

Some saves require a jtagged xbox

Any questions post below

Enjoy!