ghonma:  Thank you for the explanation!  :D  I'm a bit uncomfortable with the idea  of  trying to use  an older or outdated driver.  I'll keep that idea in mind in case I reach the point where I simply can't stand it any longer.

Believable3D: You get the jaggies when hovering over an object?  Have you turned off the outline for the selectable object, over which you're hovering (I think it can be done by altering the figure ring settings in the Poser.ini)?  In my P8, objects are jagged, but the selection outline isn't.  Interesting.

I've updated both my graphics driver and my display driver, since installing P8 about two weeks ago.  I don't think I've noticed any changes in P8 handling because of these updates, but it's hard to say because I was having so many problems early on which were solved by SR2.1, also within the same timeframe.  I wasn't really paying attention to display issues until the crashes ceased.

R_Hatch: Do you remember what settings worked for you, with nHancer?  I haven't managed to find working settings yet, and I'd be willing to brave the sluggishness, to see if my overall Poser 8 experience actually improves.

Thank you, everyone, for your help!  :D

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.