Howdy and welcome to Airforums.com, Peter! As polarlyse said, you will be able to find the info you want on here. Rotten floors is a very popular subject, and removing the hidden bolts has been discussed many times.
I'm just surprised that an '05 model would be that far gone already!
Try the search function: look up to the top of the page, and in the top dark blue horizontal bar, there is a search button towards the right side.
The Google search choice in there is the fastest, but some users find that the options in other versions of search there can get more explicit info.
Keep us informed, and please post lots of pictures. You photos will attract more interest than just a text post will, it's a fact.