How do you find out which objects the various "custom location" codes point to?

[rb813]

I've been browsing through the WW_Installed_Animations file to see which objects I can build on my lot to yield the most available sex animations. Some of the custom locations are easy to track down, because the name of the animation just says what the object is, but they aren't all that easy. I figure the people who actually make these animations must have some better way of matching a location with its custom location code. What tool would I need to access that information?