If I understand what you mean, that is also in the script.
The INI file contains a section per package. Create a GPO per section. In the Startup Script parameters, you refer to the section:
 Code:
\\domain-name\SysVol\domain-name\scripts\script.kix $INI="\\domain-name\SysVol\domain-name\scripts\script.ini" $Section="Package Name"