JACOBPERRY'S PROFILE

Alright, I feel like I keep asking questions on the forums that have already been answered, but I can't seem to find the answers anyway else, and you guys seem to be awesome at answering my questions! So thanks, now for my questions:

1.) What's the difference between RGSS and RGSS3? Or is there not one? I seem to keep seeing those as though they are both real, and different things. I figure it has to do with the different versions of RPG Maker.

2.) Does anyone know of a list that shows all the RGSS (RGSS3, like I said, I don't know) syntax? In other words, a list of all the commands that can be called/executed through the scripting system and there uses. (Most specifically commands/syntax exclusive to the RPG Maker scripting system) I know the basics of Ruby so I understand most of it's logic, but I don't know of it's applications, nor of it potential commands in the RPG Makers engines.

3.) Are the RPG Maker eventing and scripting systems interchangeable? In other words, can they both be used and mixed together in their uses? Or do you have to commit more to one or the other?

4.) Lastly, which would you suggest one focus on for more of the game's programming? (Assuming both can be used mutually)

Alright, so I'm working on a custom menu system for a game of mine in RPG Maker 2003 and I'm not sure how I would be able to display the amount of an item I hold for many items.
Example (excuse quick crappy design):


Concept:


There is no way that I know of to tell it to display a specific picture (the number) based off a variable value, as there is no way to assign pictures number values. Every idea I can think to do this requires me to write massive amounts of code over and over for each item. Also, is there any way of telling a picture number to be a variable? Any ideas?