"CONVERT" is command tool used for converting true color images (640x480x24 windows bmp image) So you should use command prompt and navigate up to folder where the program is. Syntax: convert <-bmp2csi | -csi2bmp> <-o outputfile> <inputfile> Example: I had an image named "image.bmp" in a folder together with convert.exe C:\tools\convert>convert -bmp2csi -o image.csi image.bmp CD Shell Image conversion utility, Version 1.1 Copyright (C) 2002-2005 Michael K Ter Louw Visit http://www.cdshell.org for terms of use. Bitmap image verified 640x480x24. Encoding CD Shell Image (version 1)... Image encoded successfully. Dont use convert.exe on 320x240x8 images. PS Open command prompt from START>Run using "cmd" in case u didnt know