Here are the results from the test run. I will answer your earlier questions separately.
One thing to note is the images must be loaded from the Pictures folder, which I am doing when running the droplet.
tell current application
path to library folder from user domain as text
--> "Macintosh HD:Users:????:Library:"
read file "Macintosh HD:Users:????:Library:Application Support:tweetIndex_xednIteewt.txt"
--> "2"
path to frontmost application as string
--> "Macintosh HD:Applications:Utilities:Script Editor.app:"
end tell
tell application "Script Editor"
display dialog "fake tweet :\n#HappyDays more testing of desktop tweets\nto : fakeAccountID\n with picture : file1"
--> {button returned:"OK"}
end tell
tell current application
path to frontmost application as string
--> "Macintosh HD:Applications:Utilities:Script Editor.app:"
end tell
tell application "Script Editor"
display dialog "fake tweet :\nFollow the tweeting challenge\nto : fakeAccountID\n with picture : file2"
--> {button returned:"OK"}
end tell
tell current application
path to frontmost application as string
--> "Macintosh HD:Applications:Utilities:Script Editor.app:"
end tell
tell application "Script Editor"
display dialog "fake tweet :\nTesting Tweets from my desktop again\nto : fakeAccountID\n with picture : file3"
--> {button returned:"OK"}
end tell
tell current application
path to frontmost application as string
--> "Macintosh HD:Applications:Utilities:Script Editor.app:"
end tell
tell application "Script Editor"
display dialog "fake tweet :\n#HappyDays more testing of desktop tweets\nto : fakeAccountID\n with picture : file4"
--> {button returned:"OK"}
end tell
tell current application
path to frontmost application as string
--> "Macintosh HD:Applications:Utilities:Script Editor.app:"
end tell
tell application "Script Editor"
display dialog "fake tweet :\nFollow the tweeting challenge\nto : fakeAccountID\n with picture : file5"
--> {button returned:"OK"}
end tell
tell current application
path to frontmost application as string
--> "Macintosh HD:Applications:Utilities:Script Editor.app:"
end tell
tell application "Script Editor"
display dialog "currentIndex1 = 1"
--> {button returned:"OK"}
end tell
tell current application
open for access file "Macintosh HD:Users:????:Library:Application Support:tweetIndex_xednIteewt.txt" with write permission
--> 114
set eof 114 to 0
write 1 to 114 starting at eof as text
close access 114
end tell
Result:
true