Well, thanks everyone for their help, but this Calibre is just horrible. I do understand how it works now, I enter the strings in the Save to Disk area, but the ebooks keep coming out as though I changed nothing (even though I applied the changes).
I've just deleted Calibre, will never use this again, going back to the simpler and logical iTunes for ebook organization.
Again, thanks for all your help. I guess Calibre is more geared toward programmers and such.