Optimal Kontakt Setup

Definately Halion dont work properly… so Im moving to Kontakt.
I have some problems. Maybe anyone can help me.

  1. I notice that Kontakt consume more CPU than Halion. Can I config Kontakt in any way to save some CPU?

  2. Playing big giga samples (directly from disc) I notice sometimes that a sustained note playing die if I go playing other notes. (I use max poliphony 32, so thats not the problem.

3)Better performance playing directly form disc or without it?

4)Any expecial setup for improve overal Kontakt performance?

Thanks in advance for your replys