Stefano,
I have had the last phal. about a year, I inherited it from my cousin when she moved to North Carolina. As far as how I grow it, it is planted the same as all my other orchids. It's planted in bark, I water it once a week, fertilize it every couple weeks and repot it when it needs it. Here is a picture of my setup from last year, all I have is a couple shelves on a screend porch. I live in FL, so my plants stay out uncovered most of the year, except when it gets in the 40s.