Re: Deck replacement
My best advice to you would be to start reading the other fiberglass boat restoration threads, if you really want to fix your boat you'll find them both interesting and informative. You'll see what you need to do through the pictures taht're posted better than someone can explain it in words.
As far as what you'll need to do to your boat:
1. Remove rotten decking
2. Remove wet/rotten foam.
3. Remove rotten stringers.
4. Remove rotten transom.
5. Grind the inside of your hull down to nice fresh pink glass.
6. Clean everything up.
7. Replace transom.
8. Replace stringers.
9. Decide if you want to replace the foam before or after the deck goes in and then either install the foam or decking.
As I said before, read a lot of the other f'glass resto threads and you'll know what to do and how to do it before you start work on your boat.
Feel free to ask any questions you may have and post lots of pics of your boat and work.