Andre, I was thinking of trying the same thing on a 4x5 just to see. What I was planning on trying was to soak the film in distilled water for about 5 minutes (on an already dry film and not enough contrast in the highlights for a good grade 2 print). Then I would do a "normal" soak in selenium (1:9) for 3 or 4 minutes. After this, a rinse for 10 or 15 minutes should be ok to clear the film. Dry as a normal film and see what happens. I don't think you would get more than a half to a full grade out of this process (depending on film, contrast, concentration, etc.)

I have never tried this before, but this is how I would do it. I'm sure someone on the forum will have better information and technique than this, but it would be my starting point.