.st file naming

Hi, 

while playing with GST, I found bit difficult to navigate 
through code. For example, source code for class Exception 
is in file kernel/ExcHandling.st. So I have to grep all the time. 

I wonder why is it so? Wouldn't it be better to have one file
per class name, like in Java? Similar scheme is used in Smalltalk/X
and works just fine. 
Also this would make tool implementation a lot easier - for instance
I'd like to be able to commit changes right from the browser.

Best, Jan