Thx for the reply. The info you posted is really helpful but somehow i am more confused than before. Been reading for 15 minutes and my head is spinning

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I don't know where to start. With the installer and then worry about the compression ? Should i use CI or CIU and what's the difference? So many question have arisen in my mind since i started reading from the links you posted. Someone should write a book called "Creating custom conversion for dummies" lol . Jokes aside there is much info in these threads so that it seems quite intimidating.... from the viewpoint of a beginner at least.
Can you just tell me where to begin? Maybe my first step should be to create a new Inno setup script file? It will make it easier for me to continue after you showed me the right direction.
Sorry for my many questions. At least i am trying to learn...