haha, yeah... the simple reason is that I know very little php! haha, and for me, it's easier to substitute another installation (it's only very small anyway) for a whole lot of education.
Hey, someone's done the work already. If you can use it, and it works... do it.
Ultimately, I'd consider what is your most important end result. Save space? Get it working asap? Learn how to do it? Develop a plugin (and learn how)?
Just my thoughts. Personally, if I wanted the results fast... I'd just install another wordpress and "simulate" the original to get the job done.
Hope that makes sense lol