This program is used to copy art from a source to destination (similar to uo copy). Below is remarks from the author punt:

In theory, one updates a conf file (example.conf is included) that specifes the destintion mul files (Mondain in this case), and the source you want to copy out of.

It will then "merge" the specified art work and tile data into the destintion files, but will do so by creating new files in the directory it is run from (art.wfg, artidx.wfg,tiledata.wfg).

One executes the program by :
copyart example.conf

It is worth noting, that one must accomdat the art ids (they are raw ids). So if you have a static id of 0, that is equiavelent of an art id os 0x4000 (512*32).