First of all I have to admit that Zurich was, is and will always be my homebase in FS (and hopefully soon in real life..). A long time, there was no scenery for this airport. Sure, there was an addon from flylogic.. (sorry, but this one was crap in FS2000-style). So I downloaded and tried your scenery. I was convinced of it after 60 seconds, bought it and now I'm really happy about this scenery! It's so beautiful, it brings almost tears to my eyes

The frames are also quite good, I was surprised. In my Wilco Airbus A320, I get about 15 frames while taxying and about 13 by overflying the airport. The weather was bad, many clouds, so I hope that the frames will still improve a bit as soon as the weather here in Switzerland gets better

Traffic is about 50% (MyTraffic 5.1b). Or do you have any other proposals to improve fps? However, 15fps are still ok.
In FS9, I got 32 frames (locked) with default Cessna and fair weather. GREAT!
In addition to Zurich, I bought also Geneva. This one's also a great scenery! Love it! The frames are on both airports (LSZH and LSGG) in FSX and FS) more or less about the same, at least on my system: Intel E6700 @ 2,66GHz, 4 GB DDR2 RAM, ATi Sapphire HD4870 512MB, XP MCE 32bit.
I'm looking forward to buy O'Hare and JFK.. and maybe, someday, LFSB...
