I'm looking for a new way to create difficulty display

Hmm............First I changed my nick name!~Better than CrzP I think.

I'm a CRAZY Project DIVA fun,so I want to add something like Project DIVA Arcade in my theme.
As you know,stepmania's difficulty list displays difficulty as a "list".It can be scrolled and only displays playable difficulties.

But I don't want to use it now.I want something new!0w0

there is a full list of all maps.And I'm trying to do this:
1.Five Icons with difficulty+meter display when selecting music.When Edit playable,it becomes six.
2.When a step is not palyable,it will become dark.(e.g.No beginner,then beginner Icon become dark)
3.Highlight when It is being selected(e.g.selecting medium,then medium is shining.)
4.They won't change it's place.XD

I made an example,and it worked.

	Def.Quad{

			InitCommand=cmd(x,SCREEN_CENTER_X;y,SCREEN_TOP+90;diffuse,color("#00FFFF");zoomto,SCREEN_WIDTH,30;fadetop,0.2;fadebottom,0.2);

			OnCommand=cmd(diffusealpha,0.6;playcommand,"Set");

			CurrentSongChangedMessageCommand=cmd(playcommand,"Set");

			SetCommand=function(self)

				local song = GAMESTATE:GetCurrentSong();

				local style = GAMESTATE:GetCurrentStyle():GetStepsType()

				if song:HasStepsTypeAndDifficulty(style,'Difficulty_Beginner') then

					self:diffusealpha(0.6)

				else

					self:diffusealpha(0)

				end;

			end;

			OffCommand=cmd(accelerate,0.2;diffusealpha,1;decelerate,0.4;zoomy,0;diffusealpha,0);

		};

Now I'm looking for an important thing......meter display.
I don't know params at all.Can I grab them from params?.....And how to do it?
Or......How to use GetMeter( )?

Yes, you want to use GetMeter(). GetMeter() is a member of the Steps class, so you need an instance of Steps to use it. So you want to use Song:GetOneSteps() to get the Steps for the difficulty, then call GetMeter on that Steps.
So...

local song= GAMESTATE:GetCurrentSong();

local style= GAMESTATE:GetCurrentSTyle():GetStepsType()

local steps= song:GetOneSteps(style, "Difficulty_Beginner")

if steps then

  local meter= steps:GetMeter()

  self:diffusealpha(0.6)

else

  self:diffusealpha(0)

end

If you know how, life will be easier for you if you set up one thing that uses a loop to iterate through the difficulties and set the actors for each one appropriately.

Thanks~I'll try this later.