Thank's for the responses..BUT I'm still confused..!! This will be my final post.. I think -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- I know how to add Wallpapers :: $OEM$/$$/web/Wallpapers. -- I know how to add Tweaks and Hotfixes to the Distribution. -- I NOW know HOW to make nLite AddOns, but I want to install Applications Dynamically...!! -- I started with UnattendXP, but I'm again stuck at the application part.. No Tutorial/HELP on how to integrate an application. -- I started with WPI, but It gave me an Error, cannot save file > Config.js -- Auto-IT A person said that AutoIT Script should be used only when we are unable to find the switch. The reason..? Don't know.! I think it may be slow..and Moreover, I think we need to install Auto-IT scripting Engine before we can start the installation. -- I read the Unattended XP Guide, that everyone refers too..But it lacks examples and screenshots. -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Some last Doubts -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- TELL ME IF I'm NOT CORRECT-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- When the Setup executes, we can install Applications in 2 ways - Batch Scripting & RunOneExecMethod -- Suppose I want to Install O&O Defrag v8.5, -- I used Universal Switch Finder/Detector/Extractor whatever it is... to find the right switch..It worked fine, -- I make a Registry File, register.reg so that my product is registered. -- Now what should I do next ..? -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - This is the Point where I get stuck...and Don't know what to do next.. .? Ofcourse this is a static Method of installing applications and registering them, and I don't want to follow them, BUT I still want to know what's going on..!!! But when coming to The WPI, which I find is the best utility, the information/help provided is very complex and is OHT (Over Head Transmission). It gives errors. If anyone of you can explain me how to : add even a single application, like WinRAR (Silent Install), registering it, registering extensions, and Finally burning the CD. If anyone of you can just post a STEP-by-STEP Screenshots..please do. a very needy-greedy-serious request. Thank's everyone, for spending so much time and giving me the answers and making so beautiful tools.