DWT Steganography

Question

I am studying in the field of steganography/watermarking. I am fairly new to this, so please bear with me! I found an excellent post on here How do I encapsulate some text information in an image and extract it using MATLAB? using LSB method, which I am OK with! The question I want to ask, can the code used in the link be modified to hide data in DWT transform using LSB. If so, how would I attempt it, as I said, I am fairly new to this. Would I get the four subbands and which ever subband I want to embed in,(i.e LH_1)just make changes to code, for example, where L is specified as cover image, would I change L to LL_1??

I am sorry If I confuse anyone with this question. But I need help to know! Thank you alot

edit

%Cover Image
origIm = imread('lena.bmp');


% Discrete Wavelet Transform
[LL LH HL HH]=dwt2(origIm,'haar');
dec=[...
    LL,LH
    HL,HH
    ...
    ];

%figure;imshow(dec,[]);title ('DWT');
%[visibleRows visibleColumns] = size(origIm);

A = importdata('minutiaTest.txt');
binaryString = transpose(dec2bin(A,8));
binaryString = binaryString(:);
N = length(binaryString);

b = zeros(N,1); %b is a vector of bits
   for k = 1:N
       if(binaryString(k) == '1')
              b(k) = 1;
       else
              b(k) = 0;
       end
   end
%c=HH;   
s = HH;
%figure (1);imshow(s);
height = size(HH,1);
width = size(HH,2);

k = 1; Array=[];l=1;my=1;
   for i = 1 : height
       for j = 1 : width
           LSB = mod(double(HH(i,j)), 2);
             if (k>N || LSB == b(k))
                s(i,j) = HH(i,j);
                    l=k+1;
             else 
       if(LSB == 1)
           s(i,j) = HH(i,j) - 1;
       else
           s(i,j) = HH(i,j) + 1;
             Array(my)=l;
                l=l+1;
                    my= my + 1;
       end
                          k = k + 1;
     end
   end
   end


  %figure (2); imshow(s);

  stego=idwt2(LL,LH,HL,HH,'haar');
  imwrite(uint8(stego), 'hiddenmsgimage.bmp');
  %imshow(stego);



  Stego = imread('hiddenmsgimage.bmp');
  %imshow(Stego);


 [LL LH HL HH]=dwt2(Stego,'haar');
dec=[...
    LL,LH
    HL,HH
    ...
    ];
%imshow(HH);
%figure;imshow(dec,[]);title ('DWT');
k = 1;my=1;ur=1;
for i = 1 : height
  for j = 1 : width
    if( k<=N )
      if (my<numel(Array) && Array(my)==ur)
         b(k)=~(mod(double(s(i,j)),2));
      else
         b(k) = mod(double(s(i,j)),2);
      end
    k = k + 1;
    my= my + 1;
 end
 ur=ur+1;
  end
end

Ok so this is what I have done so far. I am now trying to extract the data that I have hidden, can anyone help please?