No you can't. The pressurized tank needs to be used with a specially designed bowl. Even if you could physically modify the tank, it would not work with the bowl that you have. I believe that the "Memoirs" uses the "Ingenium" system (and I've seen enough of that system to know that one would not last in my home for a month).
The one Memoirs toilet that I have actually seen in use was newly installed in my grandmother's house shortly before it was sold. I was told that it leaked through the flush valve upon installation. I also gave it a test flush and when I did, a huge bubble of air blew out of the jet and made a splash. I was not impressed.
The professionals here on this site might be able to suggest a replacement for the Memoirs that would look just as good and most importantly would work.
I am a consumer and have a small collection of antique toilets. I also know that the newer technologies in use today have made the new toilets work as well or better (and I have to say better because they use much less water) than the antiques. My one Toto Drake (which I bought based on recommendations from this site) is proof of that.