[Greasemonkey] Execution Order and other Scripts

[Chris Telting]

Could someone tell me the execution or of Greasemonkey as far as scripts 
that already exist on the page?  I want to filter Myspace and remove a 
script that plays an annoying recurring sound file.

It seems to me that Greasemonkey is loading the script after all the 
scripts on the page execute in order and then executes my script.  I can 
see this most notably when I execute a script to remove all the img tags 
on a page but they only disappear after the page has already fully 
loaded instead of be filtered out all together before the page is rendered.