This question is about the WPMU TRIDEN Theme

Hi, I'm Montiana. I'm interested in the WPMU Triden Theme but I don't have a clear understanding about what it can offer me.
What I would like to know is:

Does this particular theme allow me to be able to add Multiple themes to it as I build my site?

I hope im making myself clear.

Suppose I was building my website using this theme, and I wanted to use a different theme to put my videos in. would I be able to add additional themes in my site without uploading another wordpress download. Please help!!!

thanks,

montiana