Smurfy's Mechlab
Stealth Sales Link.
Videos might be slightly dated(?), but the general theory is there.
<object width="560" height="315"><param name="movie" value="//www.youtube.com/v/3jCQStENuss?version=3 ... ram><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="//www.youtube.com/v/3jCQStENuss?version=3&hl=en_US" type="application/x-shockwave-flash" width="560" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>
<object width="560" height="315"><param name="movie" value="//www.youtube.com/v/Eh_9Cyj31EQ?version=3 ... ram><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="//www.youtube.com/v/Eh_9Cyj31EQ?version=3&hl=en_US" type="application/x-shockwave-flash" width="560" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>
<object width="560" height="315"><param name="movie" value="//www.youtube.com/v/6yG1J08fCHk?version=3 ... ram><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="//www.youtube.com/v/6yG1J08fCHk?version=3&hl=en_US" type="application/x-shockwave-flash" width="560" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>
MW:O resources
Here is a link to some forums that people post thier builds in. Its nice because you look up your exact variant and see what people are using. They all post links to the Smurfy's page too so you can see exactly how they built them.
http://www.mechspecs.com/forum/
http://www.mechspecs.com/forum/
WORLD CHAMPIONS!!