The program will only create an exe not a cab file. You can use the settings to create a total silent install then I think you can use nlite to add it to the RunOnceEx section?, not really sure, or you could create an addon. There is a link here to a program that may be effective in creating the addon for you. thanks for answer. I know what work your tool (very fine), but I think...expressed badly cause of my english I create a switchless SFX with your tool and created a cab file (to use with nLite) but WLM2009 is not installed. I tried to use switchless SFX with RunOnce (ever with nLite) it's worked. I read the post of elajua and him wrote... but in the thread i've found a user (mickmack) who create a switchless SFX SVCPACK compatible: http://www.msfn.org/board/index.php?showto...st&p=827839 So, I think your tool create a switchless SFX not SVCPACK compatible. Thanks for the link and info. I can update the program to add the line supplied by mickmack (cheers), if you would like to test it when it is finished?. YES! of course