disable I.E.7 script error messages

I am trying to disable script error messages in I.E.7 A previous post on this site from Feb. 15, 2009 from Calm as a bomb seems to have what I am looking for with one exception.  I have Windows XP Pro, SP3 and use Mozilla Firefox as my default browser.

Calm as a bomb gave these directions:

Type:  Services.msc into Run on the Start menu.  I did that.

Press ok  I did that

Click the Extended Tab at bottom to view all your services.  I did that.

Scroll down the list until you come to  Machine Debug Manager. 

This where I am having a problem.  My list (I have checked and rechecked it) does not have service called Machine Debug Manager.  Maybe Calm as a  bomb is running something else besides I.E.7  That's what I have and I am not getting anything named Machine Debug Manager. I am on the correct page that he states to go to.  Can this service/function be listed under or in somthing else on this page with what is operating on my system?  Thank you.