Have you looked at Doug Hennig's articles on Inno? http://doughennig.com/papers/default.html

Never put stuff in the system folder if you can avoid it. Put it in your application folder.

>Previously I have used installshield, but following problems with it I am now trying inno setup for the first time and have a couple of queries:
>
>1.How can I get the shortcut that I create to include a parameter and config file name - for example I want to have a shortcut created on the desktop that points to: c:\myappfolder\myprog.exe P -cc:\myappfolder\myconfig.fpw (where P is a single character parameter to be passed to the exe and the config file to be used by the exe is as shown).
>2. I want to include a DLL I have written along with the setup file. Does this have to go in the system folder or can I put it in the myappfolder? And do I need to include both the VBR and TBL files? And, how do I ensure that the DLL is automatically registered on the end-users PC without further user intervention?
>
>Thanks
>Barry Sutton.