Script that moves items to trash after importing to iTunes

Question

Hi,
I have zero experience in this, all I have done is just from having googled stuff, so please be patient if I'm asking stupid questions. I have tried searching the forum first but I can't find the answer to this question.
I download music from various (LEGAL) websites and I don't want to have to manually move it into iTunes. My aim is that every time an .mp3 file is downloaded into my downloads folder, it is automatically moved into my iTunes music library and added to a 'downloaded' playlist, then deleted from my downloads folder.
This has taken me ages because after I got it working I did an iTunes update which ruined it all. I tried to edit the offending actions but ended up just downgrading iTunes to the previous version via Time Machine.
I am using OS X version 10.6.7 and iTunes 10.2.1
The point I am at now is that it is all working, except that the files are not moved to the trash at the end, so every time it runs it adds the new file plus all the previous files again. Please can someone help me modify my script or my automator application so that this will happen.
Also, is it possible to have the automator application only run when music files are downloaded? Because at the moment it runs every time I download anything at all.
Here is what I have done:
I have set up a folder action so that this script is attached to my downloads folder:
on adding folder items to this_folder after receiving added_items
          tell me
                    do shell script "open -a /Users/Louisa/Documents/Workflows/justdownloadstoplaylist.app"
          end tell
end adding folder items to
Then I have saved this Automator workflow as the application justdownloadstoplaylist.app
*Get specified Finder items*
Louisa>Downloads
*Get Folder Contents*
(Repeat for each subfolder found)
*Import Files into Itunes*
(Existing playlist - "downloaded")
*Move Finder items to Trash*
Thank you for your help.

Answer 1

Sorry, there was an error with my workflow in that saving to the variable should have come after filtering the items:
Folder Action receives files and folders added to Downloads
Get Folder Contents { Repeat for each subfolder found } -- in case a folder was added
Filter Finder Items { File extension is mp3 } -- just get mp3 files
Set Value of Variable { Variable: Original Items } -- save the filtered mp3 files for later
Import Files into iTunes { Existing playlist Downloaded }
Get Value of Variable { Variable: Original Items } (Ignore Input) -- get back the mp3 files
Move Finder Items to Trash
If you are using your application in a situation where it is already getting items passed to it (e.g. dropping items onto the application, or using a Service or Folder Action), adding an action at the beginning that gets the same items will result in doubling up the items in your input list.  If you are getting confused about what is getting passed to your application, you can use a Choose from List action at the beginning of your workflow to show the items.
If you just saved your workflow as an application, dropping items onto it will pass them to your workflow, otherwise you will need to add statements to your folder action script to tell the workflow to open items passed to the folder action.  As I mentioned in my earlier post, you won't need to use your folder action script or do anything else to get items passed to your workflow if it is created using the Folder Action template.