I can get the names of all files in a folder by doing this:
tell application \"Finder\"
set myFiles to name of every file of somePath
end tell
Here's an applescriptish method to get Finder's idea of what the stripped filename is but please note it will only work if you have NOT enabled the option in Finder's preferences to "Show all filename extensions":
set extension hidden of thisFile to true
set thisName to displayed name of thisFile
-- display dialog "hey"
set extension hidden of thisFile to false