When you bought Hot Date, you also bought a folder that contained the files for creating special Townies: bikers, cops, firemen and construction workers.  They behave exactly like other townies; you can interact with them and marry them off.

The files are on your disk in the Babbages.FAR folder.  You can extract them with FarEdit and make your own .CMXs for them.  I have extracted them for you and created my own .CMX files so they will work.

If you read on one of the forums that you could merely extract these files and put them in the right folders and it would work, you were misled.  That is not enough.  The babbages.far file does not contain the .CMX files that you need in order to see the different costumes and faces.  If you have tried this, and it didn't work, then all you need is the .CMX files below in the BabbagesNPCs.zip file.

DIRECTIONS:

1. Download the BabbagesNPCs.zip file.  Unzip the files into The Sims\TemplateNPCs folder.
2. Download the BabbagesSkins.zip file.  Unzip the files into The Sims\gamedata\skins folder.
3. You might need to start a new neighborhood to generate new Townies.  If you've done this before but didn't have the CMX files, then you should suddenly see a bunch of old Townies change into bikers and cops, etc., when you restart the game.

BabbagesNPCs.zip
This contains the .iff files that go into The Sims\TemplateNPCs folder.

BabbagesSkins.zip
This contains the .BMP, .SKN, and my handmade .CMX files.  All go into The Sims\gamedata\skins folder.