Good method to Void Responsive Web Design/Media Queries for IE 8 -?

Question

I'm trying to just flat out kill my responsive Web Design and CSS3 Media Queries for all IE browsers below 8, and just have the fixed, locked, layout.

I've tried, inserting 'if IE 8+ conditionals' around my media queries within my css and it was ignored. Anyone have any simple concrete methods aside from calling in a new seperate stylesheet?