UTC

From NWN1 Custom Content Guide

[edit] UTC files

The UTC format is a GFF file format used to store information about creatures. It is thier blueprint in the toolset (not an actual instance of them in each area you place them). It includes the information in the toolset you can edit, plus engine entries such as "IsPC" and "PaletteID".

They can be found in any of the Bioware .bif files, and openable via. NwN Explorer.

You can find your own module monsters if you look in each of your modules with NwN Explorer, or open the module and find the /temp0 directory inside the /modules directory.

[edit] Usefulness

Yes, you can move these, like other things, into other modules or whatever - but exporting them in a usable ERF file is much easier. Mass-deleting is probably the most useful thing to gain from knowing the location of your own module's .utc files.

[edit] Related: .bic files

.bic files are very similar. Once the game loads a UTC file, many entries that .bic files have are, of course, added (such as the location, listening status, area Id's and ambient state).