Well, just use it! FYI, Its not perfect (of course not, this was made in scratch 1.4!).
I know, I said I have left Scratch, but I had this sitting around unfinished, and I hate to have things sitting around unfinished, so I finished it. For a better Windows Vista simulator (yes I know this is a Windows 7 simulator, but its the only other one I have!), check out http://www.vistasimulator.com/ (this is not mine) or https://bitbucket.org/humphrey14/vista-simulator-alpha (that one's mine).
