How to make a CMS like rm2k/rm2k3 without RGSS...[HELP!!!]

[Shibuya]

Elo people....Can u teach me how to make a CMS without RGSS like rm2k/rm2k3...
If u dun noe what i'm talking about...
It's something like this:
Conditional Branch: If down button press
Show picture...
and the picture wuld be something like this!
Main Menu
[Save]-save selected...
Scans

that's about it...
and i want my layout like the this

[Main Menu]-takes you to the custom menu...   
Save-Takes u to save screen
Scans-a feature in my game
Cards-another feature in my game...

[Shibuya]

BUMP...!