http://www.coniserver.net/ubbthreads/showflat.php/Cat/0/Number/811731/an/0/page/0#Post811731
As you see, it is very easy to do shadowmapping with Gamestudio the only problem is how to optimize it
What you explain is like this ("Screenspace Blurring": http://www.gamedev.net/reference/articles/article2193.asp) but with bloom which won´t change anything because you would blur the shadows, remove parts of the blur and blur it again...
Show me an example or such if you know that I am wrong

I found two more interesting techniques:


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

http://www.slindev.com