Using MUI to Check for MacroMedia Flash

I'm working on a .nsi file that is being used to create a setup file which will install a program. We need to make sure our customers have Flash installed.

I have been trying to create a MUI that will check to see if a user has the most current version MacroMedia Flash. Through research, I found the Function "IsFlashInstalled."

My problem is, after the .nsi file is compiled and I execute the setup file, the MUI does seem to check or notify me that I have a current release of Flash.

My question is...Will the MUI only notify me if I don't have the current version Flash (or if I don't have Flash) installed or is there something else I need to do (to add) in the .nsi file and then compile it again?

; Usage:
; Call IsFlashInstalled
; Pop $R0
; ; $R0 at this point is "1" or "0"

Stu

Installing Flash 9

Now that I have the MUI checking to see if Flash is installed in our customer's system, I need to load the current version of Flash into their system.

I have the MUI setup to exec the .exe of Flash 9, but it just seems to put it into the system32 folder; it does not "load" Flash into the system - at least, so our customers could use our program.

Is there a way to actually load Flash into a system using the MUI? I am wanting to make this as easy and as seemless as possible for our customers.

I have the installer plugin exe. This is what I'm trying to exec. Would it be possible to clarify your response with a little more detail?