hi geezery, Thanks for your tip, looks like a good solution but if i'm right i can't use it because i'm using landesk, and to deploy update i'm using the security and patch manager which don't allow me to customize the package.... i know it's a little bite strange but i have to use the standard package provide by landesk, and all opérations to customize have to be done after setup...... i find with filemon and regmon that when i'm running the preference tool for adobe update, the software is righting directly in the user local setings/application data/adobe/updater5in different files. I will try to customize this. in parralel work i'll try to customize the package if it's possible as you told me. thanks for your answer.