Converting this .htaccess to web.config ?

Hey Guys, I want to convert my .htacces to a web.config.
I don't know much about IIS, but my Server runs with it.

Anyone who could help me to convert this?

---------------------
RewriteEngine on
RewriteRule ^(.*).png$ signature.php?ID=$1
---------------------


Thanks



We want to replace the Link:
http://domain.de/Signature.php?ID=MyName
with
http://domain.de/MyName.png