Multiple "custom pages" withOUT multiple templates?

[MortysTW]

I've been digging around using the heck out of the search function and coming up with no luck.

What I want to do is make myself some custom pages, but I do NOT want to have to make a new template for every custom page. Everything I'm finding about "custom pages" gives me different ways but they all involve having a new template for every new page.

All I want is the code that I can put on a fresh and blank php file that will call in the globals and header and header includes, and the basics that make up a page, and if I have to make 1 template that's cool. But I want to only make that 1 template.

I need a true file I can use as my template and I just add the content I want on those pages and not have to keep going in and making new templates every time.

Get what I mean? I just want to make the typical vbulletin setup of a "shell" and I can just keep copying that page over and over and over and each time just put different content on that page.

My idea is that I plan to make 100's of pages, but I don't want to have 100's of templates to have to deal with.

Anyone clue me in on this please?

Thanks!