Hello tesse_k,
the solution is quite simple. You must setup a dreamweaver site. And in this dreamweaver site you have to define a testing server in a special way: At frist you set up the basic server as a local server:
Server Name: Local Testingserver
Connect using: Local/Network
Server Folder: [The path to your wordpress directory]
Web URL: [Will usually be automatically set. Otherwise it is something like "http://localhost/wordpress/"]
Then switch to the "Advanced" section. There you have to choose a Testing server at the very bottom. Select "PHP MySQL". You can leave all other points as they are.
Allright sparky. So far, so good. Save the settings and turn back to your coding editor. There you choose the Menu "Site". From there you go to the option "Site specific code-hints". There yu choose the structure "WordPress". Leave everything as it is.
Thats it. So now you get every code hint you want. Although the relationship between the files and the source file a function or class is coming from.
I hope that helps?
By the way: a direct view of all related files of the index.php from your themes is not posible, because the build structure starts from the very first index.php in your wordpress folder. from there on your theme will be called. The Themes index.php does not act like the wordpress index.php.