I saw that the Bobcats center and Remon van der Hare had the same cyberface but that theirs headshapes weren't the same (I compared them with Hexworkshop). However there were alot of matching strings, these matchings must be the texture maping (since they have the same cyberface) and it's located at the end of the o file (must be a 1/4 of the file, the last one; so the remaining part must be the headshape itself).
Then i taked juervin_loda.o and hudavis_loda.o and replaced the data of the maping. I got a nice result, Hubert cyberface placed perfectly on Julius headshape, there didn't appear hubert teeth (cause it still was his maping), take a look:
and these are the files, original hubert headshape and modified one :
http://members.lycos.co.uk/nbavintage/2004/HubertHS.zip
Hope some patchers get involved in this and finally we can edit headshapes
Note: to show this in the game I had to pack the loda file in the hudavis.viv an then in xplayer.viv