That is the only version which was made usable with 3DGS and C-Script.
But you can use the newest Version quite easy with Lite-C: http://www.coniserver.net/ubbthreads/showflat.php/Cat/0/Number/730904/an/0/page/0#Post730904

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com