Abobe Photoshop CS3: internal error 2739

Yeah, you are so happy to hold the new Adobe Photoshop CS3 in your hands, unwrap the packaging and want to install it. But what is this: Oh Firefox must be closed to proceed the installation. Well nothing easier than that. The mousebutton makes a click and Firefox is closed.
Then something weird happens: You get a cryptic error message.
It says something like

Internal error 2739

and you suddenly realize this is not good.You are running the new shiny Vista but why do you get this message? OK, what to do next? Well, here comes the wonderful solution. Because this error already happend to me when I tried to install a demo of Dreamweaver CS3 I knew you simply have to register a DLL file.
So open your command prompt as an admin, make sure your current directory is C:\Windows\system32 and type in the following: regsvr32 jscript.dll
And that's all. After this procedure you restart the installation and everything will work as it was intended to be :o)