Random question about building a website in pieces

1

i have built an architecture website that is very big and have been told to save space by building/uploading in pieces. i have an idea about what it means but was wondering if someone could explain the concept to me. currently my website is 5 separeate movie clips that all contain 20-30 frame animations and each clip only contains a stop frame at the end and buttons to navigate. regardless of my process, the site is way to big and i could use some clarification. thanx.

http://web.mit.edu/jbradd/www