Using script to automatically arrange timeline and sceneline workspaces.

Question

This is a simple demonstration of using VB Script to adjust panels in PE3.
In PE3, when you adjust the height of the timeline, the height of the sceneline is also adjusted the same amount, and vice versa. You could use script to automatically adjust the height of the sceneline or the timeline whenever you switch respective modes. The script below does that.
This is for those who are familiar with script writing and the Windows Script Host. The vb script below includes properties and methods from the AutoItX library (free download).
Option Explicit
Dim oAutoit, strWinText, strLastTime, lngX, lngY
Set oAutoIt = WScript.CreateObject("AutoItX3.Control")
oAutoit.WinWaitActive "Adobe Premiere Elements -"
strLastTime = "start"
Do
' Quit the script if mousepointer put in upper left corner (0,0).
lngX = oAutoIt.MouseGetPosX
lngY = oAutoIt.MouseGetPosY
if lngX = 0 and lngY = 0 then
set oAutoIt = nothing
Wscript.Echo "Your script has ended."
Wscript.Quit
end if
' Read the text of the window so we can determine the workspace setup.
strWinText = oAutoIt.WinGetText("Adobe Premiere Elements -")
' If DVD Menu tab selected, then don't do anything, otherwise
' check if in Sceneline or Timeline mode.
if instr(strWinText, "DVD Menu") = 0 then
if instr(strWinText,"EditTimeControl") <> 0 then
if strLastTime <> "timeline" then
' Reset the Edit Workspace and then adjust the timeline panel height
oAutoit.Send "{alt}wke"
oAutoit.Sleep 250
oAutoit.MouseMove 1078, 646
oAutoit.MouseDown "left"
oAutoit.MouseMove 1078,400
oAutoit.MouseUp "left"
strLastTime = "timeline"
end if
else
if strLastTime <> "sceneline" then
' Reset the Edit Workspace and then adjust the sceneline panel height.
oAutoit.Send "{alt}wke"
oAutoit.Sleep 250
oAutoit.MouseMove 1078, 646
oAutoit.MouseDown "left"
oAutoit.MouseMove 1078,762
oAutoit.MouseUp "left"
strLastTime = "sceneline"
end if
end if
end if
WScript.Sleep 2000
loop
The script might work as-is if your screen is set for 1280 x 1024 and the Premiere Elements 3 window is maximized. Save the script in a text file with a .VBS extension, and then run it. Afterwards click on the Sceneline or Timeline buttons in PE3. It may take up to 2 seconds before the mouse starts moving on it's own. The screen coordinates were ascertained using the AutoIt Info tool.

Answer 1

You shouldn't make assumptions about what the names of the volumes are - both the Finder and System Events have terminology to determine if a disk is the startup volume (or a local volume, for that matter), for example:
tell application "System Events"
  repeat with someDisk in (get disks whose startup is false and local volume is true)
    set someDisk to POSIX path of someDisk
    do shell script "diskutil umount " & quoted form of someDisk & " &> /dev/null &"
  end repeat
end tell
Note that if you are unmounting a disk from a standard account you will be prompted for administrator authentication.