gamerprinter
Mapper/Publisher
FWIW, the duskblade, dragon shaman, and other non-core classes from WotC aren't open content, so Paizo can't convert them without risking claims of IP infringement.
(Such claims might not stand up in court, but one doesn't have to lose a legal case to have the costs wreck one's business. Of course, WotC might not make any such claims -- but Paizo doesn't want to take any chances.)
If you were talking to a potential 3pp publisher, then yes, this is sound advice, but for a private use for their home game - this advice is totally meaningless.
Actually I've seen you (Coyote6) bring up this same point to every other private gamer asking the same question, which is just altogether silly. Home games have no license issue.
I am a 3pp and rightly so, I don't convert WotC non-OGL stuff nor even their OGL stuff, but then I only create brand-new classes, that are either completely my own versions or more likely have never been created before.
I wouldn't waste my time converting old 3x stuff anyway, its too easy to create brand new stuff designed specifically for Pathfinder. For most publishers its the same, so there are no issues here.
And at the OP, if you use an old OGL adventure except for the BBEG, leave the monsters and NPCs at their original power levels - granted its slightly weaker than PF classes, its not a huge issue. I would convert the bigger and more important NPCs, but keep the rest as is. It shouldn't be a problem.
GP