Ahhh you are the person who helpfully pointed this out in the original article, what are the chances lol! Thank you SO MUCH for replying!
Ok it seems like I was making it out to be more complicated than it really is, and after referring to this post and the article I feel I am SO CLOSE! So what I did was I copied and pasted the following into notepad:
@Echo off
del "C:\Documents and Settings\My Computer\My Documents\Electronic Arts\The Sims 3\CASPartCache.package"
del "C:\Documents and Settings\My Computer\My Documents\Electronic Arts\The Sims 3\scriptCache.package"
del "C:\Documents and Settings\My Computer\My Documents\Electronic Arts\The Sims 3\compositorCache.package"
del "C:\Documents and Settings\My Computer\My Documents\Electronic Arts\The Sims 3\simCompositorCache.package"
start /d "C:\Program Files\Electronic Arts\The Sims 3 Ambitions\Game\Bin" Sims3Launcher.exe
On every line, I changed "My Documents" to "Documents" as I am running Windows 8, and changed "Ambitions" on the last line to the most recent game I have installed which is "University Life". Saved as Clean Sims.bat, changed "Text Documents" to "All Files" and I saved to my desktop. It is now on my desktop, the icon has 2 blue gears on it and the file is named "Clean Sims". But when I clicked the file, a small window appears which reminds me of command prompt with the black background, and a box pops up saying "Windows cannot find 'Sims3Launcher.exe'. Make sure you typed the name correctly, and then try again." So I did that again, making sure to change My Documents to Documents and the file directory that needed to be changed, and I had the same result. Again, I am so very close!
Also, when I do have this set up, do I click on "Clean Sims" every time I want to clean out those files? And then the game launcher pops up?