http://dl.dropbox.com/u/12727985/Traveler%27sBootsforAll.xml
I'm not Heavenfall, but here is a quick mod that should do what you want. Just add it to your mods folder and enable mods (you'll probably have to start a new game). The key is the <SupportedUnitModelType> tag in the xml. It has to have an entry for all types of models that you want to use the item.
edit: Man I was ninja'd by Heavenfall. Oh, well, I'm sure his is more polished. 
edit2: Yep, Heaven's file includes his expanded faction models as well, so his is the better one to use.
