Is there any option to copy some of the files (pre installation) to the system before onFirstUIBefore() method. These files are also part of installer. I am using install shield 2009 and project type is installer script.
EDIT: Some more info. we need to run one utility which is part of setup.exe package. It should be run first in the OnFirstUIMethod() before showing up other dialogs to the user. There are around 5 dialogs in OnFirstUIMethod() method. The utility has some complex code and it's functionality can't be done with installer scripts (that's why this utility). My requirement is this utility should be part of installer package. Any thoughts are welcome.