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