Add a script to Automator's actions, or add an action to Automator's librar

Question

Total Applescript newbie here. My end goal is to write a script or automator that automatically trims 10 seconds off selected podcasts.
I know that Doug's Applescript website has something along those lines, but it's not truly automatic.
What I'd really like to do is attach a folder action so that as soon as they download the end credits are trimmed.
With automator, it's easy enough to get the finder items in the folder, and pass them to the Set iTunes Info library action, but the Start and End times of iTunes tracks aren't in there.
I tried to edit the actual script that that calls, but it's not-editable.
I tried to edit Doug's script, but I can't figure out how to tell it to pick a file from a folder as the selected track to edit.
I was thinking of an automator action that basically goes along these lines:
Get Specified Finder Items (preselecting the download folder the podcasts are dumped to)
Get Folder Contents
Run this script. (but this is where I can't figure out how to run a script and use the results from the last two automator actions)
Any ideas appreciated, or suggestion on how to just go pure Applescript on the task. I know the Applescript would read something along the lines of:
Tell application Finder
get the folder contents?
maybe set the file name or track name as a variable
Tell application iTunes
Set start of selected file/track to 15

Answer 1

Ah, you've made me a happy man this evening. I missed the Run AppleScript action in Automator, but knew there had to be a way to do something like that.
Your particular script doesn't function, it gives an unknown error on completion, but I was able to modify a Doug's AppleScript that lets you trim start or finish on items you manually select and use it as you suggested.
So here's what I ended up doing.
Automator Action which is saved as a plug-in to the Folder Actions for the folder for the Podcasts I want to trim. The Automator action reads as follows:
*Find Sources in iTunes*
-Find Songs Whose Album Contains MyPodcast
*Get Selected iTunes items*
-it's pulling all tracks in that folder, which is fine
*Filter Sources in iTunes items*
(I had to do this because before I added this step my selected podcasts showed up in results, but so did any item I had highlighted (such as the current playing track) in the results, and was passed to the final action)
*Run AppleScript*
<pre style="font-family:Monaco, monospace;border:2px inset #99f;overflow:auto;width:500px;padding:.5em;color:#000;background:#ccf;">
on run {input, parameters}
tell application "iTunes"
set trackers to input
repeat with theTrack in trackers
set start of theTrack to 11
set finish of theTrack to ((get finish of theTrack) - 18)
end repeat
end tell
return input
end run</pre>
There's probably a more elegant way to do this, and faster, as this one takes several seconds to go through the entire iTunes library each time it's ran. That's why I was trying to pass the folder contents directly to the set info action. It's kind of annoying that the built-in Automator action for this is limited on the info items it sets. It would be really cool if Apple didn't make those scripts non-editable. I could have learned exactly what I was after just by picking apart their script.
Anyways, my motivation for this was partly to learn, but inspired from a particular podcast from a local public radio station that I listen to where they bracket the beginning and end of the podcast with the typical "please donate" stuff. Normally I don't mind a short pre-roll or pledge request, but this particular one the woman has such an annoying voice, it's like fingernails on chalkboard to me, otherwise I wouldn't have bothered spending hours trying to learn how to do this to save 30 seconds of listening on a weekly podcast. LOL.
Thanks again for your pointer, I'll probably play with this some more if anyone else wants to chime in on better methods, but I'll mark it as answered as it did point me to a working solution.