Thanks for the encouragement, Chris, but it's getting discouraging. If I do crack it, I will certainly add to the pool of knowledge.
I have a suspicon ... all of our target workstations are WinXP Pro SP3 Spanish. The first poledit I used (from 2003) was in German. I was using both Spanish & English .adm's to create the NTConfig.pol - the Spanish templates come from the one Win2003 Server we have onsite. The latest, newer, poledit I got (thanks!) is in English. I created another .POL to no effect, except that poledit complained at the beginning about the Spanish characters from the Win2003 templates & wouldn't load them. Aha.
I suspect three things:
1) German-Spanish & English-Spanish character mismatches prevent the .POL from being read correctly,
and/or:
2)The common.adm & winnt.adm I got from the Win2K3 server don't work with poledit,
and/or:
3) Newer, post-SP3 settings, especially in IE7, aren't applied when using these older .adm's.
I hope I can get this going, because it would make managing the office less like herding cats!!