im just curious if its possible to import the face from a save game into to facegen, and import it into the geck or another save game

You can import a face from one savegame to another with http://www.fallout3nexus.com/downloads/file.php?id=4094, or a Facegen Modeller file (.fg) to an existing save.
I don't think you can get them into an esp to use use in the GECK, though.

You can import your face into GECK if you have Oblivion installed and Wrye Bash. The process will be something linke this:
* use Scanti's facegen to copy the face from the Fallout save file into an Oblivion save file (use one of Oblivion's vanilla races)
* use wrye bash to copy the face from the Oblivion save file into an Oblivion esp file
* use FOMM's plugin editor to edit the master file of your Oblivion esp file and change it from Oblivion.esm to Fallout3.esm
* open the esp file in GECK: you'll see the copied face as a new NPC that you can edit or set as a preset

Hope this helps

1) Save game.
2) Make an .esp in G.E.C.K. with some NPC or what you need to apply you'r face.
3) Convert FaceGen data to HEX values using http://www.fallout3nexus.com/downloads/file.php?id=9064.
4) Edit you'r .esp using http://www.fallout3nexus.com/downloads/file.php?id=637.

What he said. Easiest and most effective method.