Guessing that you have Photoshop, then this tutorial will benefit you greatly:
http://biorust.com/index.php?page=tu...etail&tutid=23
To answer your questions:
1. Tutorial answers that one.
2. ImageReady will output a BASIC html page that makes your design look like it is supposed to. This html is rather iffy so I'd reccomend putting all the pictures back together (they will be renamed like "template01.gif" so it's not as hard as it sounds). Dreamweaver will allow much more customization this way.
3. You can do what I said in Answer 2, or you can take the output html file into dreamweaver and keep the iffy html intact.
4. Negative.
5. Hopefully the tutorial will help you on this as it depends on your layout.
Hope this has been helpful.