[MetroMPG]

The "quote" part is pretty straightforward - click the "quote" button below & to the right of the post you want to quote. That'll open a new composition textbox with their quote inside it. I'd encourage you to trim out all but the relevant part of the original quote you're replying to. Then add your comments below the ending {/quote} tag.

Try it out - you'll get the hang of it pretty quick.