Thanks! I'll try that tomorrow!
No, I can't run the 64-bit. I'll have to wait for ZB5 on that, assuming they still support my OS in the next release.
When 4R7 was released, they had to write a patch specifically for my Mac Pro1,1, as some part of their coding was not recognized by my hardware. The fix for that was incorporated into the first update they released, but still not for the 64-bit.
I really need a newer Mac, but being retired and on a pension kind of prohibits that, at least for another year or so. In the meantime, I just have to make do. You'd think 16 gig of ram would handle anything ZB could throw at it, but if ZB only makes use of 4 gig, well, that's that. Strangely though, I can run multi-million poly models in other 3D apps with no problems, so it may just be something I'm doing wrong, or a setting somewhere.
Anyway, onward and upward! There's always a work-around lurking 'round the corner.
Thanks, Glenn! I'll be back when I re-Greeble to my satisfaction!