I use PS CS1 so I'm not sure what changes are in the newest version. I might be confused on the request here but here's my 2 cents, heh.
You will want to save your PS images as a graphic format such as JPG, PNG, GIF, etc. HTML is what you will use to place the images on your webpage. (If you understand this skip ahead).
Now if you're using the slicing options in PS it will save an HTML file with the code to place your image back into it's un-sliced appereance. To change the placement of the images so they are background images you will need to remove the image links from within the tablecell and place them in the tablecells property tag (ie the <TD> tag).
Example:
If the PS HTML file shows:
<table><tr><td><img src="http://forums.xisto.com/no_longer_exists/;
You will want to change it to:
<table><tr><td background="http://forums.xisto.com/no_longer_exists/, blah, the text you want OVER the images.</td></tr></table>
You can also use CSS position tags to place objects over each other.
I hope I understood the question and have been able to help.
