This tool does one simple thing; it converts sprites from the RPG Maker 2000 format to the RPG maker VX format. To get these sprites usable in Intersect please see the VX to XP tool.
It's simple to use; Upon starting the application it will prompt you to place your files in the input folder. Hit a key and the application will do all the work for you.
In case you want to see or change the source code for this application, see GitHub.