CSV Import Categories

Howdy! I'm in the process of building out my product list in the sample .csv file that I found on the forums. I'm curious to know if I can add additional information for upload. For example, I'd like to add the meta descriptions and image links, but I'm not sure if this is possible. In Googling around, I found what looks like the addition of meta_description in the top bar, but I'm not sure if that will work with the MP system. Any feedback/advice would be greatly appreciated.

Thank you!
Michael Long
michael@rightrocks.com