Go to http://www.testosterone.net and look at the articles by Brock strasser in the previous issues area. It is a fairly recent one where he describes both methods.
This method is touted by the suppliers of Androsol, so I would take that advice with a grain of salt. Outside of the claims on their site, I haven't seen a post by a single person saying that was an effective method of using Fina. For the $50 it costs to buy Androsol (which I think is only a 2 week supply), you could easily buy a kit and some Test, and make it a more "legitimate" way to use Tren IMO.