along with that goto this topic & grab Reg to INNO Converter ENG.rar which will create a iss file so you can put those exported reg entries into your Inno script. They will of course need to be edited. IE in screenshot above shows InstallDir=E:\Program Files (x86)\Resident Evil 5, which would be changed to {app} so that anyone can install to where they want to & not to 1 specific location.
http://fileforums.com/showthread.php?t=92995