Don't feel too bad PadRat. It's not always easy when you are new at this.
When I first came here I wanted to do exactly what you want to do and didn't have a clue. I followed JohnBoy's tutorial and still didn't get it right. With more help I finally succeeded and am using a live USB with persistence as we speak.
The terms and things I take for granted now, were like a foreign language to me at the time.
Sometimes a little step seems to be left out in the explanations. It really isn't. For example, my problem was mainly partitioning the drive and making a proper changes file. It was explained correctly but my ignorance let it slip right by.
You "WILL" succeed. No one here will let you fail. So look forward to getting it just the way you want it.
All the good people here that helped me is why I am still here today. It's like a home to me now.
The best forum I have ever been in.