Two vintage Poser forums are now on the Internet Archive, in newly searchable form: one (threaded, complete with images, 2016-2020) and two (a substantial archive of posts, but not complete and no images). Get ’em while they’re hot.
Once downloaded and extracted these can be searched with desktop-search software such as: DocFetcher (free and the best, but was broken by the very latest Java update); Multifind (free but has limitations); Copernic Desktop (nice but subscription-ware); or dtSearch (for pros, very expensive but you may find an old copy somewhere). Or, possibly there’s something in Windows 10 that bypasses the need for such extra software. I’m running on Window 8.1.x (thank goodness), so Windows 10 is a mystery to me.