Fireworks Question (Into Dreamweaver)

I’ve got a quick question:

I’ve designed a spash page in Fireworks, complete with background and everything else. I’m no graphic artist, but it’s a start.

My question is, when I got export it for Dreamweaver it looks like crap and it doesn’t fit properly. I was thinking about just using tables (some else told me CSS is better).

I’ve got how I can use image spacers to save space and loading time (use background color on tables instead of images), but after I’m lost.

What should I do to make it fit and look somewhat decent? Should I include the background or break it up and use it via DW?