AppleScript help please: Final Cut Pro / selecting drop down items

Question

Hi,
I am wondering if anyone can help guide me wih a spot of AppleScript?
I'm new to it as of tonight (last time I made a script was 11 years ago, and that was a very basic one!).
Basically, my problem is I have a long term bug in Final Cut Pro which causes it to crash on launch everytime, unless I delete the Preferences file first.
(btw This problem exsisted in Snow Leopard and has continued with Lion. I think it is plug-in related, but I've never figured out which or why, and have had a topic ongoing on here int he FCP forum for some time with no luck).
Anyway, so far I have made a script which trashed the preferences and launches the program, like this:
try
          do shell script "rm /Users/redhavoc/Library/Preferences/Final\\ Cut\\ Pro\\ User\\ Data/Final\\ Cut\\ Pro\\ 7.0\\ Prefs.fcset "
end try
delay 1
tell application "Final Cut Pro" to activate
So far, so good.
However, what I would REALLY like to do, is continue this script to reset all the preferences automatically!
When launching FCP (as the preferences are gone) this is the first thing that comes up:
So, my question is:
How can I choose which items I want selected from the drop down boxes with my AppleScript?
(Specifically, option 7 in the "Format" drop down, and option 3 in the "Rate" drop down, then more complexly, choosing which folder I want in the "Primary Scratch Disk" drop down (which opens an "Open" dialogue) ).
Thanks in advance!

Answer 1

Ok, so I've worked out what the drop down boxes are called by digging through the package plist and strings files.
So now I have:
try
          do shell script "rm /Users/redhavoc/Library/Preferences/Final\\ Cut\\ Pro\\ User\\ Data/Final\\ Cut\\ Pro\\ 7.0\\ Prefs.fcset "
end try
delay 1
tell application "Final Cut Pro" to activate
tell application "System Events"
          tell process "Final Cut Pro"
  activate
                    tell combo box "formats" of window "firstStart"
  click button 1
                              repeat 6 times
  keystroke (ASCII character 31)
                              end repeat
  keystroke return
                    end tell
          end tell
end tell
But the error now returned is:
System Events got an error: Can’t get window "firstStart" of process "Final Cut Pro".
So I changed that line to:
tell combo box "formats" of front window
But now the error says:
System Events got an error: Can’t get window 1 of process "Final Cut Pro". Invalid index.
Hmmmm.... am I getting any closer??