Gavin,

 

 

The "insert image", "insert flash", "insert media", "insert document", "insert template" dialogs contain the file manager.

 

You can use the file manager create the folder, delete the folder, upload/delete/rename the file.

 

For your situation, please check the "insert template" which also allows you upload/delete/create/editng the HTML files.

 

Hope it helps.

 

Let me know if you have any further questions.