Thanks to some kind folks over at the AppleScript listerve, I finally got this script working in Revolution. Ignore my previous question - - - it's all answered now. Line 3 needed to say NAME OF the first process....
set creaType to "MSIE"
tell application "Finder" to open application file id creaType
tell application "Finder" to set appOfMine to (the name of the first process whose creator type is "MSIE")
tell application appOfMine
set theSource to �event MSIESORC�
display dialog "source = " & theSource
end tell
