I've got two major problems I need help with.

First, I have tried two different versions of Poser (Poser 6 and Poser 7), on three different computers, and each time it's the same: Poser arbitrarily chokes up, lags, freezes, and crashes at the most random times. Three different computers, all of different makes, models, and stats (but all theoretically capable of running Poser no problem, and two of which shared the same operating system) with two different versions of Poser, and each and every one had the same problems with it. I dunno if it's just that Poser hates me, or what, but I'm getting really tired of having my files corrupted and losing my work because Poser refuses to cooperate. Can anyone help me understand what's going on, and how to fix it?

The second deals with animating in Poser: recently, I tried making an animation with props, but the props won't work with me. If I try to have a prop stay stationary until someone moves it in a later keyframe, it ends up moving around throughout the animation. If I want to have a prop invisible or removed until a later keyframe, it shows up in the entire animation. In other words, Poser simply refuses to apply any changes I make to a prop in the animation to the keyframes I made the changes in, it ALWAYS has to apply the changes to the ENTIRE ANIMATION. I'm not sure what I need to do to keep that from happening, but I'd really like some suggestions on it.

One last question: I tried converting my animation into an .swf file, but Poser completely shut down. It didn't do that when I tried making the animation into an .avi. Do I need a plugin for Poser to make .swf Poser animations?