Pressure Treated Wood

I'm planning to frame a 12x12-ft greenhouse with pressure treated lumber and have a few questions about using this material. I'm seeking solid advice.

1. What can I do to minimize warping? This is critical.

2. How should I go about drying the wood before using it? How long? How to stack? Rotation necessary?

3. How should I treat freshly cut ends? Preservative? What kind?

4. Paint or stain on finished frame? What kind? Special application?

5. What kind of fasteners? Screws? Stainless?

6. Given the extra work in using treated wood, does red cedar or redwood become cost effective?

Thanks,

Hank