AppleScript doesn't work if Spaces in File/Folder path - applescript

Question

This works ok, UNLESS there are Spaces (and maybe other special characters) anywhere in the folder path. if there are spaces, then the check for folder exists fails, how can I make it work?
tell application "Finder"
set mySaveASDelimiters to AppleScript's text item delimiters
set myScriptFilePath to (path to me)
set mySourceFolder to folder of myScriptFilePath
set myFileAliasList to the entire contents of mySourceFolder
set myPOSIXSourceFolder to URL of mySourceFolder
set myPOSIXSourceFolder to characters 8 thru -1 of myPOSIXSourceFolder as string
repeat with myFile in myFileAliasList
set myFileName to name of myFile
log "myFileName: " & myFileName
if (myFileName ends with ".txt") then
set AppleScript's text item delimiters to "."
set myFolderName to first text item of myFileName
set AppleScript's text item delimiters to mySaveASDelimiters
set myFolderPath to myPOSIXSourceFolder & myFolderName as string
log "myFolderPath: " & myFolderPath
tell application "System Events"
if not (exists folder myFolderPath) then
beep
display dialog "Could not find Folder for File: " & myFileName
return {}
end if
end tell
end if
end repeat
end tell
Lets make this easier:
set myScriptFilePath to (path to me)
set mySourceFolder to folder of myScriptFilePath
set myPOSIXSourceFolder to POSIX path of mySourceFolder
I get an error on myPOSIXSourceFolder, why! I just want the current folder path in POSIX notation! I have fixed it now:
set myAppFile to (path to me)
set myAppFilePath to ((path to me as text) & "::") --Magic I was looking for
set myAppFolder to POSIX path of (myAppFilePath) as string
set myFilePath to myAppFolder & "ModTest1"
log "myAppFilePath: " & myAppFilePath
log "myAppFile: " & myAppFile
log "myAppFolder: " & myAppFolder
log "myFilePath: " & myFilePath
set thePath to myFilePath
tell application "System Events"
if exists folder thePath then
beep
end if
end tell

Answer 1

set myAppFile to (path to me)
set myAppFilePath to POSIX path of ((path to me as text) & "::") --Magic I was looking for
This is the answer I was looking for, its basically the syntax takes a bit of getting used to, one of the problems with AppleScript......