Photoshop is for images only. Don't attempt to use the exported code on real web sites. It won't work in the wild. Why? Because the code isn't good & the tables are too rigid to hold anything other than the image slices. When you attempt to edit this layout in DW or any HTML editor, the whole thing falls apart and produces unsightly gaps between slices.
The reason it doesn't look right in IE is because the code lacks a valid document type declaration on the first line. This causes IE to render the page in Quirks Mode.
The export HTML feature in Photoshop is really only for quick comps to show a client before you begin building the actual web site with HTML and CSS code.
Although written for Fireworks, the 3-part tutorial below describes the procedure for bringing your design comp into a CSS Layout in DW. If you get stuck on anything, feel free to post specific questions in the DW general discussion forum.
Part 1 - Initial Design
http://www.adobe.com/devnet/dreamweaver/articles/dw_fw_css_pt1.html
Part 2 - Markup preparation
http://www.adobe.com/devnet/dreamweaver/articles/dw_fw_css_pt2.html
Part 3 - Layout and CSS
http://www.adobe.com/devnet/dreamweaver/articles/dw_fw_css_pt3.html
Have fun!
Nancy O.
