Minimize a document file with AppleScript?

With the below script, how can tell applescript to minimize the opened file ?

tell application "Finder" of machine "eppc://mediacenter:musiccows@mediacenter.local"
	open document file "Airtunes.trak" of folder "Desktop" of folder "mediacenter" of folder "Users" of startup disk with collapsed
end tell

many thanks as this is my first post

Hi grahma

Not able to test this but:

tell application "Finder" of machine "eppc://mediacenter:musiccows@mediacenter.local"
   open document file "Airtunes.trak" of folder "Desktop" of folder "mediacenter" of folder "Users" of startup disk 
   set collapsed of document file "Airtunes.trak" of folder "Desktop" of folder "mediacenter" of folder "Users" of startup disk to true
end tell

if this doesn’t work sorry but it won’t be a million miles away.
good luck