Ah ok. I use Wineskin Winery for Rejuv and the like, works pretty well despite being a bit outdated at this point. Here's the steps to set it up:
-Download Wineskin Winery here: http://wineskin.urgesoftware.com/tiki-index.php?page=Downloads
-Download the Windows version of Rejuv and unzip it, and move the folder to your desktop (or somewhere else where you can find it easily)
-Open up WW, you'll get a window that looks like this. Click the + to download a new engine if you don't currently see any, then with an engine selected, click "Create New Blank Wrapper".
-Name it whatever you want, then hit OK. It'll take a minute or two to set up, hit "View Wrapper in Finder" and drag it to the desktop when you're done.
-Find it on the desktop, double-click it and select "install software".
-Click "Move a Folder Inside"
-Find the downloaded Rejuvenation folder from before, confirm that, hit "ok" on the next screen, then quit and relaunch, and you should be good to go.