Sudden crashing while posing or morphing is usually fixed by updating video drivers. Poser 8 pushes the display hardware a lot harder than Poser 7 did, and exposes bugs in the display drivers that didn't used to matter. Many people have stopped the crashes simply by getting the latest driver for their display device.

If that doesn't help, you can try not using hardware accelerated preview - switch to SreeD mode, where all the preview drawing is done in Poser.

The reason you can't load Alyson is because she uses the new P8 rigging system and Poser 7 doesn't understand it.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)