Rpg Maker Developers Group

So I'm currently implementing Kread-Ex's Beautiful Alchemy Synthesis system, but as I'm going through it I noticed a few hiccups that may make me have to change it. 
I'd like to keep the overall script intact, this would mean to add note tags and I'm a beginner with ruby. So I was hoping for maybe some support from a few progammers on this. If I could get a tutorial on adding the first note tag, I know I can implement more.

Notetag Example - Synth_Process_Type - Creates a weapon, Item, or Armour based on the process, whether it be alchemy, smithing, or even crafting. Maybe adding numbers for each of the processes as well.

An example

1 - Smithing

2 - Apothecary

3 - Clockwork

4 - Engineering

So when you assign the process it can go back to it.  

Notetag Example - Synth_ req_Process_ Level - Instead of using a synthesis level for all of the processes, we use a synthesis level for each process. So if a player does a lot of smithing, their smithing level will go up. I'd also like to try and have a script call for leveling up or leveling down a process level as well. This will be used as rewards and punishments. 

The Script can be found here. 

http://dl.dropboxusercontent.com/u/52061415/Scripts/Alchemic_Synthesis_v2.rb