Ultra-Newb Needs Help

I don't want to embarass myself by saying how new I am new to web building...well...I guess I already did.

Here's my story up to now...

Built a website with WYSIWYG Web Builder 5, from Pablo. Turned out fine. Then I found out how complicated a User Registration/Password handling script is, so I bought User Registration Solutions Pack.

I have downloaded all files (except Help File #1 on Importing an .SQL into MySQL...it comes up blank...I have a ticket in on that one). I believe I have modified all the files necessary to work with my host and site. All is fine (relatively...so far) through Step #4.

Then I hit a brick wall that I'm very familiar with. When I insert the code(s) for the .php into an HTML form in my Web Builder 5, all I get is raw script on my published page.

Like I said, I'm so new at this that I have diaper-rash...please be kind.

1) I haven't published this to my Hostgator account for fear of wiping out the internet for miles around.

2) Not having published it (except in Local Publish on my hard drive), I don't think my computer/WYSIWYG is handling the .php properly.

3) The help file #5 only shows how to incorporate this Pack using Dreamweaver. I don't have Dreamweaver.

I am missing something so basic here, I am sure to be embarassed when I find out what it is. But please remember, there are a lot of us out here that just don't understand all the jargon we find concerning .php and it's fit with .html, WYSIWYG, etc. Assuming I have steps 1 through 4 correct, can someone help me with Step 5?...Incorporating the pages into my site?

Am I even asking the right questions?

Thanks in advance,
Newbie D. Newb