I recently used the FUDGE/FATE levels to run a Star Trek game.  However, I used the levels to rank skills from 2-12, and then used 2d6 roll under as a dice resolution method.  I used 2d6 rather than 4dF for two reasons:

1.  No special dice needed and it was easy to explain for new folks.
2. Give a little more spread of results for combat than 4dF (I could be wrong on this)

If you are interested, take a look at:

http://teamanrpg.weebly.com/trek-characters.html

The characters are at the top, and a brief rules summary is at the bottom.  Any thoughts are welcome.