Specifically, there's a set of .WOP files floating around that enable NPCs to wear hats from MoFI - Problem is, since the Editor doesn't support them, the hats only show up as numbers in the NPC options (ie. "Hat: 24").
Needless to say, that's not exactly helpful, is it? As a result, I did a bit of poking around, and put this together. This isn't a huge amount of work to do, so I take no credit for it, but it's much simpler to use this than to open up MoFI and create a character every time just to check a hat's number.
It's nothing complicated - just a set of 26 images, one for all the hats (minus colour variants) and all the glasses/accessories.
I'm aware there's no NPC .WOP's for MoFI accessories at the moment - I'm working on one of these myself, which I'll attach here for anyone interested once I'm done.
Anyways, uh, yeah. I hope some of you will get some use out of this, at least.

[size=0](Also, not really related, but Patrick can we please get a max filesize increase, 800KB is not a lot)[/size]
EDIT: I've figured out what byte controls the glasses NPCs wear. Working on a pack for the glasses/accessories in MoFI now. One problem is that the Hat/Accessories modifier resets to the Editor/WA1's "locked" values if you try changing it, meaning the only way to have an NPC with a set of glasses and a hat from MoFI would be to have a .WOP for it directly...
If anyone wants, I can take requests for that kind of .WOP file. There's no way I'm going to make one for every single hat/glasses combination in MoFI without knowing someone's going to end up using them.

EDIT 2: Attached .WOP files. Each one is just the default Stinker NPC but with one of MoFI's glasses/accessories on.
The .WOP filenames describe what the accessory is, as unlike the MoFI hat .wop files, the glasses field just appears as "Default" with any of these.