1. There is no known program that will extract the resources from the Dominion Wars' resource file.
2. Simon & Schuster wouldn't be very happy about you even attempting it.
3. Even if you could somehow extract the resources, I doubt it would be in any format that you could import.
If you really want the model that badly, just make it yourselves. I wanted new Dominion ships for ages and ages, no-one made any, so I made some myself, and I am continuing to do so.
And on a side note, I think that you are all being a bit disrespectful to Skinman about his model. He took the design and made a new ship, it's every modeller's right to artistic licence when it's their time that their spending to make something for the community, then 1) half of you can't remember that he made it and 2) you poke holes in it. If I were him, I would be feeling pretty hurt right now.
In summary: Either like it (be grateful that someone actually made the model), or lump it and make your own.