Chris,
It's a multi-step process.
1. Suggest your first rename your Local Publish folder to another name, such as Previous_DDMMYY. And create a template of the current site as this is the best backup process.
2. In Fusion change the publish method to .PHP. Go to PUBLISH>Publish Settings>Advanced and change the File EXTENSION to .PHP - if it's not in the list type in .PHP
I use the example of the index page but repeat the following for every page that has an iFrame call:-
3. Open index.php and replace the iFrame with a text box, CTRL+T, enter
Code:
<?php include 'html/content-index.php'; ?>
and for all other pages use:-
Code:
<?php include 'content-YYYYY.php'; ?>
because of the folder structure.
4. Re-size the page accordingly as you will no longer need a page 2000 px long.
5. Rename the page that WAS the iFrame feeding your index page and call it content-index (or whatever naming conventions you prefer).
6. Repeat for all iFrame pages, local publish.
You wont be able to view the pages locally unless you install and set up a local server like XAMPP, but you are probably good to go, so upload the new set of PHP pages to the sever. Best to clean up the server first and move the old HTML pages to a folder to match your recently renamed local folder e.g. Previous_DDMMYY.
7. When you are happy with the result. Change all your Cushy references to the new .php pages.
Personally I like to clean up the 'content-xxxx.php' pages manually to remove the unwanted html that Fusion generates. But the pages will still work if left alone but it's cleaner, tidier, faster, if you strip out the unwanted markup (one of the reasons I and others have requested a selectable publish format to generate plain text pages). In theory you wont be editing these pages again in Fusion so a manual effort is OK. I use ConTEXT a freeware editor (ConText Download).
Good luck. Once you get to grips with this method you'll find lots of other ways to benefit from the php include!