Use "Wally" to open CS 1.6 *.WAD files and extract the images so you can rip them to a CS2D tileset. Wally can be found on FPSBANANA.COM under Tools -> Counter-Strike.
I have no idea what your trying to convert either.
What exactly are you doing?
Do it the simple way and learn more, go to your CS2D folder and go to "gfx" then "tiles" and open a blank there you must be very precise of what your doing since the tile size is only 32x32. Draw something in the tiles and later on save, and open it afterwards in the editor to see your tiles.