Ways to accelerate startup from CD?

I want to redistribute Firefox on a CD along with a big folder hierarchy full of HTML pages, images, PDF files, etc.

FirefoxPortable seems ideal for the job, because it's free, easily and completely customisable, etc.

The problem is, when launching FirefoxPortable from CD, it takes a *long* time to start. I'm talking about 30 seconds, on some computers even nearly a minute. The bottleneck doesn't seem to be the CD drive though - it seems as if a lot of things need to be processed to create a temporary profile in the temporary directory.

Are there ways to speed this up?