Indeed @SCRIPTDIR is what i need.
It's an autorun cd which calls a kix script.
The user see a menu to choose his OS and the script will backup/copies the hosts file, next it wil determine which version of IE is used. If it's below version 6 or 128-bits encryption, it's installing IE6 or a patch to 128-bits encryption (W95).

Thanks a lot also for mention IEAK.

Greetz