Hello!
Thanks for designing this helpful program.  I asked a question earlier and got some very helpful feedback, so thank you for that as well 
I need some help with preparing the DM, blocks, and contrast for 2 study paradigms. 
My study contains:
 90 subjects, 3 groups (or 2 groups, depending on hypothesis tested), and 2 measures.

Demonstrating using 3 subjects to save space, the following design has been working beautifully to show a difference between the measures(t-test):
_______________________________________________________
                time1 = 1  
        const   time2 =-1
  
subj1     1        1  
subj2     1        1    
subj3     1        1    
subj1     1       -1   
subj2     1       -1    
subj3     1       -1   
       
contrast  0       1  
      
exchangeblocks 1  2  3  1  2  3
_______________________________________________________

Now I need to compare the (time1-time2) repeated measures from group 1 to group (2 or 3), and additionally to compare all three.  Will the following work?

1. Repeated measures, comparing (group 1 - group 2): t-test.

_______________________________________________________
                     time1 = 1    group1
          const      time2 =-1    group(2or3)
 
subj1       1           1           1   
subj2       1           1           1   
subj3       1           1          -2   
subj1       1          -1           1   
subj2       1          -1           1   
subj3       1          -1          -2   
      
contrast    0           0           1   
      
exchangeblocks 1  2  3  1  2  3
_______________________________________________________
 
2. Repeated measures, (group 1 = group 2 = group 3): f-test
 
_______________________________________________________
                    time1 = 1  group1  group2  
          const     time2 =-1  group3  group3  
subj1       1           1         1       0  
subj2       1           1         0       1  
subj3       1           1         0       0  
subj1       1          -1         1       0  
subj2       1          -1         0       1  
subj3       1          -1         0       0  
      
contrast    0           0         1       1  
        
exchangeblocks 1  2  3  1  2  3
_______________________________________________________

Thanks so much for the help!

Jay